A multipurpose rotary device includes a rotor configured to include a plurality of blades in a circumferential direction; and a load guide body configured to guide a flow of fluids flowing into the inside of the rotor, wherein the load guide body includes an upper support member and a lower support member configured to be disposed to face each other at the upper and lower sides thereof and connected to one another such that the rotor is rotatably installed; load guide plates configured to correspond to the blades and are rotatably installed between the upper and lower support members in a longitudinal direction; and stop pins configured to be formed on inner surfaces facing the upper and lower support members to control a rotational angle of the load guide plates.