diff --git a/src/java/com/google/devtools/mobileharness/service/deviceconfig/tool/BUILD b/src/java/com/google/devtools/mobileharness/service/deviceconfig/tool/BUILD
new file mode 100644
index 0000000000..b76279dff7
--- /dev/null
+++ b/src/java/com/google/devtools/mobileharness/service/deviceconfig/tool/BUILD
@@ -0,0 +1,50 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+load("@rules_java//java:java_binary.bzl", "java_binary")
+load("@rules_java//java:java_library.bzl", "java_library")
+
+package(
+    default_applicable_licenses = ["//:license"],
+    default_visibility = [
+        "//:deviceinfra_all_pkg",
+        "//javatests/com/google/devtools/mobileharness/service/deviceconfig/tool:__pkg__",
+    ],
+)
+
+java_binary(
+    name = "device_config_importer",
+    main_class = "com.google.devtools.mobileharness.service.deviceconfig.tool.DeviceConfigImporter",
+    runtime_deps = [":device_config_importer_lib"],
+)
+
+java_library(
+    name = "device_config_importer_lib",
+    srcs = ["DeviceConfigImporter.java"],
+    deps = [
+        "//src/devtools/mobileharness/api/deviceconfig/proto:device_config_service_java_proto",
+        "//src/devtools/mobileharness/api/deviceconfig/proto:device_java_proto",
+        "//src/devtools/mobileharness/api/deviceconfig/proto:lab_device_java_proto",
+        "//src/java/com/google/devtools/mobileharness/service/deviceconfig/rpc/stub:annotation",
+        "//src/java/com/google/devtools/mobileharness/service/deviceconfig/rpc/stub:device_config_stub",
+        "//src/java/com/google/devtools/mobileharness/service/deviceconfig/rpc/stub/grpc:device_config_grpc_stub_module",
+        "//src/java/com/google/devtools/mobileharness/shared/util/base:proto_text_format",
+        "//src/java/com/google/devtools/mobileharness/shared/util/flags",
+        "//src/java/com/google/devtools/mobileharness/shared/util/flags/core:flags_manager",
+        "//src/java/com/google/devtools/mobileharness/shared/util/logging:google_logger",
+        "@maven//:com_google_guava_guava",
+        "@maven//:com_google_inject_guice",
+    ],
+)
diff --git a/src/java/com/google/devtools/mobileharness/service/deviceconfig/tool/DeviceConfigImporter.java b/src/java/com/google/devtools/mobileharness/service/deviceconfig/tool/DeviceConfigImporter.java
new file mode 100644
index 0000000000..eb1032eeb2
--- /dev/null
+++ b/src/java/com/google/devtools/mobileharness/service/deviceconfig/tool/DeviceConfigImporter.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.devtools.mobileharness.service.deviceconfig.tool;
+
+import static com.google.common.collect.ImmutableList.toImmutableList;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.collect.ImmutableList;
+import com.google.common.flogger.FluentLogger;
+import com.google.devtools.mobileharness.api.deviceconfig.proto.Device.DeviceLocator;
+import com.google.devtools.mobileharness.api.deviceconfig.proto.Device.DeviceLocatorConfigPair;
+import com.google.devtools.mobileharness.api.deviceconfig.proto.DeviceConfigServiceProto.UpdateDeviceConfigsRequest;
+import com.google.devtools.mobileharness.api.deviceconfig.proto.DeviceConfigServiceProto.UpdateLabConfigRequest;
+import com.google.devtools.mobileharness.api.deviceconfig.proto.LabDevice.LabDeviceConfig;
+import com.google.devtools.mobileharness.service.deviceconfig.rpc.stub.Annotation.DeviceConfigGrpcStub;
+import com.google.devtools.mobileharness.service.deviceconfig.rpc.stub.DeviceConfigStub;
+import com.google.devtools.mobileharness.service.deviceconfig.rpc.stub.grpc.DeviceConfigGrpcStubModule;
+import com.google.devtools.mobileharness.shared.util.base.ProtoTextFormat;
+import com.google.devtools.mobileharness.shared.util.flags.Flags;
+import com.google.devtools.mobileharness.shared.util.flags.core.FlagsManager;
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.inject.Key;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+/** Tool to import device configs from a textproto file to the config service. */
+public final class DeviceConfigImporter {
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+
+  public static void main(String[] args) throws Exception {
+    FlagsManager.parse(args);
+
+    String filePath = Flags.labDeviceConfigFile.getNonNull();
+    if (filePath.isEmpty()) {
+      System.err.println("Error: --lab_device_config is required.");
+      System.exit(1);
+    }
+
+    String target = Flags.configServiceGrpcTarget.getNonNull();
+
+    logger.atInfo().log("Reading config file: %s", filePath);
+    String content = Files.readString(Path.of(filePath));
+
+    logger.atInfo().log("Parsing config file...");
+    LabDeviceConfig labDeviceConfig = ProtoTextFormat.parse(content, LabDeviceConfig.class);
+
+    logger.atInfo().log("Connecting to Config Service at: %s", target);
+    Injector injector = Guice.createInjector(new DeviceConfigGrpcStubModule(target));
+    DeviceConfigStub stub =
+        injector.getInstance(Key.get(DeviceConfigStub.class, DeviceConfigGrpcStub.class));
+
+    new DeviceConfigImporter().importConfig(stub, labDeviceConfig);
+  }
+
+  @VisibleForTesting
+  void importConfig(DeviceConfigStub stub, LabDeviceConfig labDeviceConfig) throws Exception {
+    if (labDeviceConfig.hasLabConfig()) {
+      var labConfig = labDeviceConfig.getLabConfig();
+      logger.atInfo().log("Found LabConfig for host: %s", labConfig.getHostName());
+      logger.atInfo().log("Updating LabConfig...");
+      stub.updateLabConfig(
+          UpdateLabConfigRequest.newBuilder()
+              .setLabConfig(labConfig)
+              .setClient("importer")
+              .build());
+      logger.atInfo().log("LabConfig updated.");
+    }
+
+    var deviceConfigs = labDeviceConfig.getDeviceConfigList();
+    if (!deviceConfigs.isEmpty()) {
+      logger.atInfo().log("Found %d DeviceConfigs.", deviceConfigs.size());
+      ImmutableList<DeviceLocatorConfigPair> pairs =
+          deviceConfigs.stream()
+              .map(
+                  c ->
+                      DeviceLocatorConfigPair.newBuilder()
+                          .setDeviceLocator(
+                              DeviceLocator.newBuilder().setDeviceUuid(c.getUuid()).build())
+                          .setDeviceConfig(c)
+                          .build())
+              .collect(toImmutableList());
+
+      logger.atInfo().log("Updating DeviceConfigs...");
+      stub.updateDeviceConfigs(
+          UpdateDeviceConfigsRequest.newBuilder()
+              .setClient("importer")
+              .addAllDeviceLocatorConfig(pairs)
+              .build());
+      logger.atInfo().log("DeviceConfigs updated.");
+    }
+
+    logger.atInfo().log("Done.");
+  }
+
+  @VisibleForTesting
+  DeviceConfigImporter() {}
+}