An electronic device according to various embodiments comprises: a housing; a mounting structure connected to the housing and configured to be detachably worn on a part of the body of a user; a touchscreen display exposed through a portion of the housing; an input interface located on the housing or attached to the housing; a processor operatively connected to the touchscreen display and the input interface; a volatile memory operatively connected to the processor; and a nonvolatile memory operatively connected to the processor, wherein the nonvolatile memory is configured to store a plurality of application programs, and may store instructions which, when executed, enables the processor to receive, from an external electronic device, data including association information between a user-related event and one or more of the application programs, store the data in the nonvolatile memory, detect the user-related event, and load the one or more application programs into the volatile memory, while a user interface of the application program is not displayed on the touchscreen display. Other embodiments are also possible.