Smart Click wrench is a combination of traditional click wrench function and digital sensor, wireless communication technology products, suitable for fast beat and data recording, traceability requirements of the production line. The operator tightened the bolt with a wrench. After the torque reached the target value, the mechanical force rod of the tool tripped and issued a "click" sound. At the same time, the digital sensor wirelessly sent the actual torque value and related information to the host computer. The wrench control circuit determines whether the current tightening torque is qualified according to the preset tightening roll and alarms the operator to indicate the tightening state. Without losing the convenience of the traditional click wrench, it is endowed with intelligence to realize the real-time wireless transmission of tightening data and curves.