The invention discloses an adaptive alternating current/direct current universal electromagnetic mechanism with a permanent magnet. The mechanism comprises a moving iron core, a static iron core, a coil system, a yoke system, a permanent magnet and a polar cap of the permanent magnet. By introducing the permanent magnet to provide an initial counterforce for the electromagnetic mechanism, the problem of poor mechanical reliability when a counterforce spring is used is solved and the matching relationship between an attractive force and the counterforce is also optimized, thereby facilitating the acceleration of movement speed of the moving iron core and the improvement of sensitivity of the electromagnetic mechanism. The shape of the moving iron core is a combination of a circular truncated cone and a cylinder or a combination of a prism and a prismatic table, and the cylinder or the prism part can have a groove; based on the parameter matching between the moving iron core and the other parts in the electromagnetic mechanism, the technical bottleneck that the acting characteristics of the alternating current/direct current universal electromagnetic mechanism with a permanent magnet is influenced by the current direction of the coil system or the polarity of the permanent magnet can be overcome fundamentally, therefore, the adaptive alternating current/direct current universal electromagnetic mechanism with a permanent magnet can be applied to short-circuit current sensing, mechanism unlocking or moving contact push execution units for low-voltage alternating current/direct current electric appliances.