This paper studied the dynamic response characteristics of color sensor. The phase method was used to test and analyze the dynamic response characteristics of color sensor. A testing device was set with the embedded industrial touch screen as the controlling core in combination with the color sensor, the Fuji servo motor, the servo drive and the encoder to indirectly test the dynamic response time. The MATLAB software was used to process experimental data to analyze its dynamic characteristics. The dynamic response time was measured to be 2 ms according to the phase method based on touch screen in the dynamic response time, and its system was a first order system. The measurement method was simple and reliable, and the dynamic response time can be measured in a variety of sensors and can determine the system characteristics.