A wirelessly-controlled automatic releaser including a housing, rechargeable batteries, wireless controls, an electromagnetic mechanism, and a release mechanism. The housing is provided with a cylindrical configuration having a upper cavity and a coaxial lower cavity. The wireless controller includes a remote control, a control switch, antennas, and a wireless control module. The electromagnetic mechanism includes an electromagnet and an iron core. The release mechanism includes a release pin, a movable sleeve and a release sleeve sequentially suited to one another from inside to outside.