The invention provides the technical scheme of a Web inquiring method for a power device monitoring system, the method of the technical scheme is as follows: inputting the related information to be inquired at the client, the client analyzes and divides the inputted statement for extracting the key words, a server receives the key words for comparing the information in the database, extracting the data, which is the same with the key words and generating the inquiring result. The information monitored by the power monitoring system can be inquired by adopting the technical scheme, and the inquired item can be optimized, the corresponding inquiring frequency is recorded for the convenience of the following inquiring operation.