During the research of using manipulators to detect avionics buttons in the avionics joint debugging and commissioning robotics system， two compliant detection algorithms for avionics buttons based on joint torque sensors are proposed to solve the problems of complex detection environment and the requirement of adapting to different types of buttons and localization errors from visual system. The algorithms are used to detect the three main types of buttons appeared in the avionics joint detection environment. The contact localization and operation algorithm based on external force threshold detection is used to realize the relocalization and safe operation of buttons and lever switches. The algorithm first estimates the external force appiled to the end effector through a generalized momentum observer， and then sets an operating force threshold when the manipulator is moved to detect buttons. The compliant button operation algorithm based on impedance control is used for compliant clamping operation of the rotary switch. The manipulator is changed to low impedance mode when the switch is clamped， so that the end effector can comply with the internal force during button operation. Button detection experiments are carried out in both the simulated cabin and the actual avionics joint detection environment. Experiment results show that the proposed algorithms have advantages of high adaptability to different button types and localization errors， and can improve the success rate and safety of detecting avionics buttons.