Disclosed is a method for providing information in a server. Said method for providing information in a server includes: a step for repeatedly receiving at preset intervals, data related to a plurality of sensors provided in an electronic device; a step for storing the data received at the preset intervals; a step for comparing data corresponding to a first period and data corresponding to a second period among the stored data, and thereby sensing a change in the performance of the electronic device; and a step for providing guidance information corresponding to the sensed change in performance to a user terminal device which corresponds to the electronic device.