The invention relates to a method for realizing automatic hanging by adopting a robot during flow type movement of a hanging board. The method comprises steps as follows: 1), a pendant in a feeding station is moved to a hanging station close to the robot in a translational manner by a conveying unit; 2), the position of the pendant in the feeding station is corrected by a correcting mechanism, anda hanging buckle part of the pendant is enabled to right face the hanging board; 3), by means of monitoring for the moving hanging board, when the hanging condition is met, the robot hooks the pendant rapidly and hangs the pendant to the hanging board during synchronous movement with the hanging board, and when the hanging condition is not met, the robot stops the hanging action or enables the hooked pendant to be away from the hanging board and enters a waiting state, thereby being ready for the next hanging action. According to the method, the pendant can be supplied automatically and position and angle of the pendant can be adjusted, then the robot extracts the pendant, and hanging buckle butt joint is realized under synchronous movement with the hanging board, so that the hanging stability and accuracy are greatly improved.