The embodiment of the invention discloses a dynamic characteristic test and temperature synchronous measurement system for a bimetallic strip on a circuit breaker. The system comprises an upper computer, a digitally controlled current source, a high-speed camera, a thermal infrared imager, a test fixture device and a data analyzer. The upper computer synchronously controls the output or the termination of a first control instruction, a second control instruction and a third control instruction. The digitally controlled current source is controlled by the first control instruction to output a current to the test fixture device and cause the thermal deformation of the bimetallic strip. The high-speed camera is controlled by the second control instruction to acquire the dynamic displacement image of each mark point on the bimetallic strip. The infrared thermal imager is controlled by the third control instruction to acquire the dynamic temperature of the bimetallic strip. The data analyzer figures out a displacement curve of the bimetallic strip along with the time change according to the dynamic displacement image of each mark point on the bimetallic strip, and figures out a temperature curve of the bimetallic strip along with the time change according to the dynamic temperature of the bimetallic strip. According to the embodiment of the invention, not only the dynamic features of the deformation of the bimetallic strip can be measured, but also the dynamic features of the temperature change of the bimetallic strip can also be measured.