diff --git a/.chronus/changes/emitter_name-2024-5-3-22-57-49.md b/.chronus/changes/emitter_name-2024-5-3-22-57-49.md
new file mode 100644
index 0000000000..4ff152d8fe
--- /dev/null
+++ b/.chronus/changes/emitter_name-2024-5-3-22-57-49.md
@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@azure-tools/typespec-client-generator-core"
+---
+
+support new typespec emitter naming rule
\ No newline at end of file
diff --git a/packages/typespec-client-generator-core/src/internal-utils.ts b/packages/typespec-client-generator-core/src/internal-utils.ts
index e2a7902d93..70c1d96ee2 100644
--- a/packages/typespec-client-generator-core/src/internal-utils.ts
+++ b/packages/typespec-client-generator-core/src/internal-utils.ts
@@ -62,7 +62,7 @@ export function parseEmitterName(
     );
     return diagnostics.wrap("none");
   }
-  const regex = /(?:cadl|typespec)-([^\\/]*)/;
+  const regex = /(?:cadl|typespec|client|server)-([^\\/-]*)/;
   const match = emitterName.match(regex);
   if (!match || match.length < 2) return diagnostics.wrap("none");
   const language = match[1];
diff --git a/packages/typespec-client-generator-core/test/internal-utils.test.ts b/packages/typespec-client-generator-core/test/internal-utils.test.ts
index 68ee5afdc1..03cdc2a1f2 100644
--- a/packages/typespec-client-generator-core/test/internal-utils.test.ts
+++ b/packages/typespec-client-generator-core/test/internal-utils.test.ts
@@ -51,4 +51,17 @@ describe("typespec-client-generator-core: internal-utils", () => {
       strictEqual(docHelper.details, "This is a description");
     });
   });
+  describe("parseEmitterName", () => {
+    it("@azure-tools/typespec-{language}", async () => {
+      const runner = await createSdkTestRunner({ emitterName: "@azure-tools/typespec-csharp" });
+      await runner.compile("");
+      strictEqual(runner.context.emitterName, "csharp");
+    });
+
+    it("@typespec/{protocol}-{client|server}-{language}-generator", async () => {
+      const runner = await createSdkTestRunner({ emitterName: "@typespec/http-client-csharp" });
+      await runner.compile("");
+      strictEqual(runner.context.emitterName, "csharp");
+    });
+  });
 });