An electric dust collecting device, comprising: a mixing part into which outside air flows; an electrostatic sprayer configured to spray charged droplets to the mixing part to be combined with contaminants contained in the outside air; a dust collecting part configured to form an electric field and adsorb the droplets combined with contaminants; and a draining part combined with the dust collecting part to discharge the droplets adsorbed by the dust collecting part, wherein the dust collecting part comprises: a charging part; and an adsorption part oppositely combined with the charging part, and configured to adsorb the droplets passing through the charging part, and wherein the charging part comprises: a plurality of charge wires disposed along a length of the charging part and configured to allow power to be applied to an upper end part of the charge wires, and disposed in parallel to each other along a width of the charging part; and a plurality of ground plates disposed between the plurality of charge wires, characterized in that the draining part comprises a plurality of condensation members combined with lower end parts of the plurality of ground plates wherein the condensation members are configured so that droplets condensed on the ground plates accumulate in the condensation members, become larger, and drop to the outside. a mixing part into which outside air flows; an electrostatic sprayer configured to spray charged droplets to the mixing part to be combined with contaminants contained in the outside air; a dust collecting part configured to form an electric field and adsorb the droplets combined with contaminants; and a draining part combined with the dust collecting part to discharge the droplets adsorbed by the dust collecting part, wherein the dust collecting part comprises: a charging part; and an adsorption part oppositely combined with the charging part, and configured to adsorb the droplets passing through the charging part, and wherein the charging part comprises: a plurality of charge wires disposed along a length of the charging part and configured to allow power to be applied to an upper end part of the charge wires, and disposed in parallel to each other along a width of the charging part; and a plurality of ground plates disposed between the plurality of charge wires, characterized in that the draining part comprises a plurality of condensation members combined with lower end parts of the plurality of ground plates wherein the condensation members are configured so that droplets condensed on the ground plates accumulate in the condensation members, become larger, and drop to the outside. a charging part; and an adsorption part oppositely combined with the charging part, and configured to adsorb the droplets passing through the charging part, and wherein the charging part comprises: a plurality of charge wires disposed along a length of the charging part and configured to allow power to be applied to an upper end part of the charge wires, and disposed in parallel to each other along a width of the charging part; and a plurality of ground plates disposed between the plurality of charge wires, characterized in that the draining part comprises a plurality of condensation members combined with lower end parts of the plurality of ground plates wherein the condensation members are configured so that droplets condensed on the ground plates accumulate in the condensation members, become larger, and drop to the outside. a plurality of charge wires disposed along a length of the charging part and configured to allow power to be applied to an upper end part of the charge wires, and disposed in parallel to each other along a width of the charging part; and a plurality of ground plates disposed between the plurality of charge wires, characterized in that the draining part comprises a plurality of condensation members combined with lower end parts of the plurality of ground plates wherein the condensation members are configured so that droplets condensed on the ground plates accumulate in the condensation members, become larger, and drop to the outside.