The invention discloses a multipurpose wet electrostatic precipitator, and aims to solve the problem that an existing wet electrostatic precipitator is only applied to collection of dust floating in the air. According to the multipurpose wet electrostatic precipitator, a high-pressure isolator (8) which can be communicated with water in a water bath tank (5) is further arranged on the water bath tank (5), and accordingly, water in the water bath tank (5) can enter the lower part of the high-pressure isolator (8); the upper part of the high-pressure isolator (8) is connected with an air inlet of a high-pressure fan (6) through a pipeline, an air outlet of the high-pressure fan (6) is connected with an air duct (10) through a pipeline, the lower end of a dust collecting air inlet pipe (12) at the upper end of the high-pressure isolator (8) is communicated with water in the high-pressure isolator (8), and the upper end of the dust collecting air inlet pipe (12) is connected with a dust collecting rake through a pipeline. Therefore, the multipurpose wet electrostatic precipitator has the advantages that the multipurpose wet electrostatic precipitator can collect dust floating in the air, can treat dust falling on the ground and equipment and has low probability of explosion and burning.