The invention discloses a power control device based on the Internet of Things. The power control device comprises a box body. A box door is hinged to one side of the box body; a toughened glass observation window is arranged on the box door; a handle is arranged on the box door; and a box lock is arranged on the handle. One side of the box body is fixedly connected with a case body; two ventilation holes are formed in one side of the box body; and the inside of the case body and the inside of the box body are communicated through the ventilation holes. A gauze is arranged in the case body; aheat dissipation plate is further fixedly connected in the case body and includes a heat absorption fin plate and an installation plate; a set of draught fans are arranged on the installation plate; and the wind directions of the draught fans are as follows: the inside of the case body faces the outside of the case body. When a screwing bolt is rotated, the direction of gas sprayed by a gas spraying hole can be changed; the good adaptation to heat dissipation effects of electric appliance parts with different lengths can be realized by changing the direction of the air flow; the service life of the power control device based on the Internet of Things is prolonged; an accident of a part due to the too high temperature is prevented; the time of air movement in the box body is increased; andthe heat dissipation effect is enhanced.