A testing apparatus for a television system is provided. The testing apparatus includes an analysis module, a signal generating module, a transmitting module, a receiving module, and a judging module. The analysis module receives and analyzes a control signal to generate an analysis result. The signal generating module generates a test signal according to the analysis result. The transmitting module transmits the test signal to the television system. The receiving module receives a response signal from the television system. The judging module judges whether the response signal correctly corresponds to the test signal.