A submersible propeller that includes a battery and propellers in which: the propellers include a left propeller and a right propeller; front portions of the left propeller and the right propeller are connected to a waist-wearing power supply battery through a power supply cable for the left propeller and a power supply cable for the right propeller respectively. Rear portions of the left propeller and the right propeller are connected to a left angle controller and a right angle controller through a connection cable for the left angle controller and a connection cable for the right angle controller respectively. The left propeller and the left angle controller are symmetrically distributed left-and-right with respect to the right propeller and the right angle controller. By using angle controllers on the legs, various modes such as advancing, variable-speed advancing, retreating, turning, and in-situ spinning can be implemented.

A control method using angle controllers to sense an included angle between a diver's thigh and a calf and controlling a propellor state based on the included angles. The propellor states include a retreating state when both included angles are 90 or less, a static state when both included angles are 90 to 135, a variable-speed advancing state when both included angles are greater than 135, a turning-left state when the left included angle is 90 to 135 and the right included angle is greater than 135, a turning-right state when the right included angle is 90 to 135 and the left included angle is greater than 135, and an in-situ spinning state when one included angle is 90 or less and the other included angle is greater than 135.

A control method using angle controllers to sense an included angle between a diver's thigh and a calf and controlling a propellor state based on the included angles. The propellor states include a retreating state when both included angles are 90 or less, a static state when both included angles are 90 to 135, a variable-speed advancing state when both included angles are greater than 135, a turning-left state when the left included angle is 90 to 135 and the right included angle is greater than 135, a turning-right state when the right included angle is 90 to 135 and the left included angle is greater than 135, and an in-situ spinning state when one included angle is 90 or less and the other included angle is greater than 135.