The invention discloses a seal management method. The seal management method comprises the steps that a seal opening prompt and a plugging release application are sent to an administrator PDA, the administrator judges whether to agree to release plugging, if yes, plugging is released, and if not, plugging is kept, a random 2D code and current time are generated on the seal surface, a user presses the seal surface, and accordingly the seal surface penetrates through a plugging part to make contact with the paper surface; after the seal surface leaves the paper surface, the plugging part releases the unplugging state of the seal surface; the seal surface is plugged again; and the user connects an upper main body and a lower main body of a seal; and a trigger point arranged on the upper main body senses connection between the upper main body and the lower main body, and a seal putting-away prompt is sent to the administrator PDA.