The invention provides an electric service test vehicle 
signal dynamic detection 
system and method. In the electric service test vehicle operation process, 
track circuit information, compensation 
capacitor information, 
transponder information, traction 
backflow information, circuit equipment appearance state information, 
train speed and position information and the like are mainly acquired in realtime, the information is processed through all subsystems and then input into a detection 
server, and after being comprehensively processed and stored through the detection 
server, the information isdisplayed in real time through all 
terminal equipment. The 
system comprises the comprehensive detection subsystem, the 
track circuit detection subsystem, the compensation 
capacitor detection subsystem, the 
transponder detection subsystem, the traction 
backflow detection subsystem, the 
video detection subsystem, the detection 
server, detection terminals and the like. The 
system and method have thebeneficial effects that a multi-task multithread 
processing method is used, information such as the 
train-mounted 
track circuit transmission characteristic, a compensation 
capacitor and a transpondermessage is detected in the electric service test vehicle operation process, and through comprehensive analysis, the equipment application quality is counted, and the level is estimated.