The invention discloses a concrete contraction full-automatic wireless acquisition system which mainly comprises a concrete contraction measuring device, a temperature and humidity adjustable controldevice, a temperature and humidity detection device and a contraction transmission and receiving device. The system is suitable for testing expansion and contraction of different forms of concrete components. Concrete contraction measurement has high accuracy requirement (the contraction is usually 2x10<-4>). The test accuracy of the present concrete contraction detection device is 10<-3> and automatic data acquisition and analysis cannot be performed, and thus the test piece is taken out in a reciprocating way, the test data are instable and discrete and the manual workload is high. The errorof the measurement process caused by test piece movement in the test process can be eliminated, the test accuracy is enhanced to 10<-4> from 10<-3>, full-automatic wireless data acquisition can be realized and different temperature and humidity environments of the concrete can be realized. The instrument is easy to assemble, convenient to operate and economical and applicable.