diff --git a/core/data/src/main/java/com/wei/picquest/core/data/di/DataModule.kt b/core/data/src/main/java/com/wei/picquest/core/data/di/DataModule.kt
index f1dec62..130ee9f 100644
--- a/core/data/src/main/java/com/wei/picquest/core/data/di/DataModule.kt
+++ b/core/data/src/main/java/com/wei/picquest/core/data/di/DataModule.kt
@@ -1,5 +1,7 @@
 package com.wei.picquest.core.data.di
 
+import com.wei.picquest.core.data.repository.DefaultSearchImagesRepository
+import com.wei.picquest.core.data.repository.SearchImagesRepository
 import com.wei.picquest.core.data.utils.ConnectivityManagerNetworkMonitor
 import com.wei.picquest.core.data.utils.NetworkMonitor
 import dagger.Binds
@@ -11,6 +13,11 @@ import dagger.hilt.components.SingletonComponent
 @InstallIn(SingletonComponent::class)
 interface DataModule {
 
+    @Binds
+    fun bindsSearchImagesRepository(
+        searchImagesRepository: DefaultSearchImagesRepository,
+    ): SearchImagesRepository
+
     @Binds
     fun bindsNetworkMonitor(
         networkMonitor: ConnectivityManagerNetworkMonitor,
diff --git a/core/data/src/main/java/com/wei/picquest/core/data/model/SearchImages.kt b/core/data/src/main/java/com/wei/picquest/core/data/model/SearchImages.kt
new file mode 100644
index 0000000..df45fee
--- /dev/null
+++ b/core/data/src/main/java/com/wei/picquest/core/data/model/SearchImages.kt
@@ -0,0 +1,63 @@
+package com.wei.picquest.core.data.model
+
+import com.wei.picquest.core.network.model.NetworkSearchImages
+
+data class SearchImages(
+    val total: Int,
+    val totalHits: Int,
+    val images: List<ImageDetail>,
+)
+
+data class ImageDetail(
+    val id: Int,
+    val pageURL: String,
+    val type: String,
+    val tags: String,
+    val previewURL: String,
+    val previewWidth: Int,
+    val previewHeight: Int,
+    val webformatURL: String,
+    val webformatWidth: Int,
+    val webformatHeight: Int,
+    val largeImageURL: String,
+    val imageWidth: Int,
+    val imageHeight: Int,
+    val imageSize: Long,
+    val views: Int,
+    val downloads: Int,
+    val likes: Int,
+    val comments: Int,
+    val userId: Int,
+    val user: String,
+    val userImageURL: String,
+)
+
+fun NetworkSearchImages.asExternalModel() = SearchImages(
+    total = this.total,
+    totalHits = this.totalHits,
+    images = this.hits.map { networkImageDetail ->
+        ImageDetail(
+            id = networkImageDetail.id,
+            pageURL = networkImageDetail.pageURL,
+            type = networkImageDetail.type,
+            tags = networkImageDetail.tags,
+            previewURL = networkImageDetail.previewURL,
+            previewWidth = networkImageDetail.previewWidth,
+            previewHeight = networkImageDetail.previewHeight,
+            webformatURL = networkImageDetail.webformatURL,
+            webformatWidth = networkImageDetail.webformatWidth,
+            webformatHeight = networkImageDetail.webformatHeight,
+            largeImageURL = networkImageDetail.largeImageURL,
+            imageWidth = networkImageDetail.imageWidth,
+            imageHeight = networkImageDetail.imageHeight,
+            imageSize = networkImageDetail.imageSize,
+            views = networkImageDetail.views,
+            downloads = networkImageDetail.downloads,
+            likes = networkImageDetail.likes,
+            comments = networkImageDetail.comments,
+            userId = networkImageDetail.userId,
+            user = networkImageDetail.user,
+            userImageURL = networkImageDetail.userImageURL,
+        )
+    },
+)
diff --git a/core/data/src/main/java/com/wei/picquest/core/data/repository/DefaultSearchImagesRepository.kt b/core/data/src/main/java/com/wei/picquest/core/data/repository/DefaultSearchImagesRepository.kt
new file mode 100644
index 0000000..f20cfdf
--- /dev/null
+++ b/core/data/src/main/java/com/wei/picquest/core/data/repository/DefaultSearchImagesRepository.kt
@@ -0,0 +1,35 @@
+package com.wei.picquest.core.data.repository
+
+import com.wei.picquest.core.network.Dispatcher
+import com.wei.picquest.core.network.PqDispatchers
+import com.wei.picquest.core.network.PqNetworkDataSource
+import com.wei.picquest.core.network.model.NetworkSearchImages
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.withContext
+import javax.inject.Inject
+
+/**
+ * Implementation of the [SearchImagesRepository].
+ * @param ioDispatcher 用於執行 IO 相關操作的 CoroutineDispatcher。
+ * @param network 數據源的網路接口。
+ */
+class DefaultSearchImagesRepository @Inject constructor(
+    @Dispatcher(PqDispatchers.IO) private val ioDispatcher: CoroutineDispatcher,
+    private val network: PqNetworkDataSource,
+) : SearchImagesRepository {
+
+    /**
+     * @param query。A URL encoded search term. If omitted, all images are returned. This value may not exceed 100 characters.
+     * Example: "yellow+flower"
+     * @return 一個 Flow，內容為 Search Images 的數據。
+     */
+    override suspend fun getSearchImages(
+        query: String,
+    ): Flow<NetworkSearchImages> = withContext(ioDispatcher) {
+        flow {
+            emit(network.searchImages(query))
+        }
+    }
+}
diff --git a/core/data/src/main/java/com/wei/picquest/core/data/repository/SearchImagesRepository.kt b/core/data/src/main/java/com/wei/picquest/core/data/repository/SearchImagesRepository.kt
new file mode 100644
index 0000000..5e1a293
--- /dev/null
+++ b/core/data/src/main/java/com/wei/picquest/core/data/repository/SearchImagesRepository.kt
@@ -0,0 +1,9 @@
+package com.wei.picquest.core.data.repository
+
+import com.wei.picquest.core.network.model.NetworkSearchImages
+import kotlinx.coroutines.flow.Flow
+
+interface SearchImagesRepository {
+
+    suspend fun getSearchImages(query: String): Flow<NetworkSearchImages>
+}
diff --git a/core/network/src/main/java/com/wei/picquest/core/network/PqNetworkDataSource.kt b/core/network/src/main/java/com/wei/picquest/core/network/PqNetworkDataSource.kt
new file mode 100644
index 0000000..16dc2ff
--- /dev/null
+++ b/core/network/src/main/java/com/wei/picquest/core/network/PqNetworkDataSource.kt
@@ -0,0 +1,11 @@
+package com.wei.picquest.core.network
+
+import com.wei.picquest.core.network.model.NetworkSearchImages
+
+/**
+ * Interface representing network calls to the PicQuest backend
+ */
+interface PqNetworkDataSource {
+
+    suspend fun searchImages(query: String): NetworkSearchImages
+}
diff --git a/core/network/src/main/java/com/wei/picquest/core/network/di/FlavoredNetworkModule.kt b/core/network/src/main/java/com/wei/picquest/core/network/di/FlavoredNetworkModule.kt
new file mode 100644
index 0000000..a0d5333
--- /dev/null
+++ b/core/network/src/main/java/com/wei/picquest/core/network/di/FlavoredNetworkModule.kt
@@ -0,0 +1,19 @@
+package com.wei.picquest.core.network.di
+
+import com.wei.picquest.core.network.PqNetworkDataSource
+import com.wei.picquest.core.network.retrofit.RetrofitPqNetwork
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+/**
+ * TODO Wei 移動至 build variants 下產出資料夾
+ */
+@Module
+@InstallIn(SingletonComponent::class)
+interface FlavoredNetworkModule {
+
+    @Binds
+    fun binds(implementation: RetrofitPqNetwork): PqNetworkDataSource
+}
diff --git a/core/network/src/main/java/com/wei/picquest/core/network/di/NetworkModule.kt b/core/network/src/main/java/com/wei/picquest/core/network/di/NetworkModule.kt
new file mode 100644
index 0000000..57ec455
--- /dev/null
+++ b/core/network/src/main/java/com/wei/picquest/core/network/di/NetworkModule.kt
@@ -0,0 +1,36 @@
+package com.wei.picquest.core.network.di
+
+import com.wei.core.network.BuildConfig
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import kotlinx.serialization.json.Json
+import okhttp3.Call
+import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object NetworkModule {
+
+    @Provides
+    @Singleton
+    fun providesNetworkJson(): Json = Json {
+        ignoreUnknownKeys = true
+    }
+
+    @Provides
+    @Singleton
+    fun okHttpCallFactory(): Call.Factory = OkHttpClient.Builder()
+        .addInterceptor(
+            HttpLoggingInterceptor()
+                .apply {
+                    if (BuildConfig.DEBUG) {
+                        setLevel(HttpLoggingInterceptor.Level.BODY)
+                    }
+                },
+        )
+        .build()
+}
diff --git a/core/network/src/main/java/com/wei/picquest/core/network/model/NetworkSearchImages.kt b/core/network/src/main/java/com/wei/picquest/core/network/model/NetworkSearchImages.kt
new file mode 100644
index 0000000..3394a5b
--- /dev/null
+++ b/core/network/src/main/java/com/wei/picquest/core/network/model/NetworkSearchImages.kt
@@ -0,0 +1,63 @@
+package com.wei.picquest.core.network.model
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * Network representation of [SearchImages] when fetched from /
+ */
+@Serializable
+data class NetworkSearchImages(
+    @SerialName("total")
+    val total: Int,
+    @SerialName("totalHits")
+    val totalHits: Int,
+    @SerialName("hits")
+    val hits: List<NetworkImageDetail>,
+)
+
+@Serializable
+data class NetworkImageDetail(
+    @SerialName("id")
+    val id: Int,
+    @SerialName("pageURL")
+    val pageURL: String,
+    @SerialName("type")
+    val type: String,
+    @SerialName("tags")
+    val tags: String,
+    @SerialName("previewURL")
+    val previewURL: String,
+    @SerialName("previewWidth")
+    val previewWidth: Int,
+    @SerialName("previewHeight")
+    val previewHeight: Int,
+    @SerialName("webformatURL")
+    val webformatURL: String,
+    @SerialName("webformatWidth")
+    val webformatWidth: Int,
+    @SerialName("webformatHeight")
+    val webformatHeight: Int,
+    @SerialName("largeImageURL")
+    val largeImageURL: String,
+    @SerialName("imageWidth")
+    val imageWidth: Int,
+    @SerialName("imageHeight")
+    val imageHeight: Int,
+    @SerialName("imageSize")
+    val imageSize: Long,
+    @SerialName("views")
+    val views: Int,
+    @SerialName("downloads")
+    val downloads: Int,
+    @SerialName("likes")
+    val likes: Int,
+    @SerialName("comments")
+    val comments: Int,
+    @SerialName("user_id")
+    val userId: Int,
+    @SerialName("user")
+    val user: String,
+    @SerialName("userImageURL")
+    val userImageURL: String,
+)
diff --git a/core/network/src/main/java/com/wei/picquest/core/network/retrofit/RetrofitPqNetwork.kt b/core/network/src/main/java/com/wei/picquest/core/network/retrofit/RetrofitPqNetwork.kt
new file mode 100644
index 0000000..e18a633
--- /dev/null
+++ b/core/network/src/main/java/com/wei/picquest/core/network/retrofit/RetrofitPqNetwork.kt
@@ -0,0 +1,56 @@
+package com.wei.picquest.core.network.retrofit
+
+import com.jakewharton.retrofit2.converter.kotlinx.serialization.asConverterFactory
+import com.wei.core.network.BuildConfig
+import com.wei.picquest.core.network.PqNetworkDataSource
+import com.wei.picquest.core.network.model.NetworkSearchImages
+import kotlinx.serialization.json.Json
+import okhttp3.Call
+import okhttp3.MediaType.Companion.toMediaType
+import retrofit2.Retrofit
+import retrofit2.http.GET
+import retrofit2.http.Query
+import javax.inject.Inject
+import javax.inject.Singleton
+
+private const val PIXABAY_BASE_URL = BuildConfig.BACKEND_URL
+private const val API_KEY = BuildConfig.API_KEY
+
+/**
+ * Retrofit API declaration for Pixabay Network API
+ */
+interface RetrofitPixabayApi {
+    /**
+     * https://pixabay.com/api/?key=${api key}&q=yellow+flowers&image_type=photo
+     */
+    @GET(".")
+    suspend fun searchImages(
+        @Query("key") apiKey: String = API_KEY,
+        @Query("q") query: String,
+        @Query("image_type") imageType: String = "photo",
+        // Add more parameters as needed
+    ): NetworkSearchImages
+}
+
+/**
+ * [Retrofit] backed [PqNetworkDataSource]
+ */
+@Singleton
+class RetrofitPqNetwork @Inject constructor(
+    networkJson: Json,
+    okhttpCallFactory: Call.Factory,
+) : PqNetworkDataSource {
+
+    private val pixabayApi = Retrofit.Builder()
+        .baseUrl(PIXABAY_BASE_URL)
+        .callFactory(okhttpCallFactory)
+        .addConverterFactory(
+            networkJson.asConverterFactory("application/json".toMediaType()),
+        )
+        .build()
+        .create(RetrofitPixabayApi::class.java)
+
+    override suspend fun searchImages(query: String): NetworkSearchImages {
+        return pixabayApi.searchImages(query = query)
+    }
+}
diff --git a/secrets.defaults.properties b/secrets.defaults.properties
index a7f254e..a8f4b44 100644
--- a/secrets.defaults.properties
+++ b/secrets.defaults.properties
@@ -1,4 +1,5 @@
 ## This file provides default values to modules using the secrets-gradle-plugin. It is necessary
 # because the secrets properties file is not under source control so CI builds will fail without
 # default values.
-BACKEND_URL="https://pixabay.com/api/"
\ No newline at end of file
+BACKEND_URL="https://pixabay.com/api/"
+API_KEY="fake_api_key"
\ No newline at end of file