The invention discloses a moisture-proof condensed water guiding device which comprises a casing with a built-in power supply, wherein a moisture sensor, a controller and a draught fan are arranged on one side in the casing; the air outlet of the draught fan and the exhaust outlet in the casing are communicated; air inlets are formed in the casing; a water manifold connector communicated with a water collecting case in the casing is arranged at the lower part of the casing; a heating sheet is arranged at middle-upper part in the casing; a semiconductor cooler corresponding to the exhaust inlet of the draught fan is arranged at the lower part in the casing; the moisture sensor, the controller, the draught fan, the heating sheet and the semiconductor cooler are connected with the power supply through conducting wires respectively; the power supply is connected with an external power supply through a conducting wire plug; the semiconductor cooler is positioned at the upper part of the water collecting case. The moisture-proof condensed water guiding device has the advantages that the structure is simple, the assembly is convenient and the technical problems in the prior art that the moisture-proof and moisture removal operation are time-consuming and toilsome, the components in a cabinet are easy to be corroded and aged and the safety is unguaranteed are solved.