Provided are a method and apparatus for controlling at least part of one or more functions of an electronic device so as to reduce power consumption. According to various embodiments, the electronic device may perform operations of identifying the number of one or more displays functionally connected with the electronic device, executing at least part of one or more functions of the one or more displays in a first power consumption mode if the number of one or more displays is singular, and executing at least part of one or more functions of the one or more displays in a second power consumption mode if the number of one or more displays is plural.