1. A method for activating a group widget by a widget client, the method comprising: receiving widgets from a surrounding widget server; analyzing the received widgets and grouping the widgets according to the result of the analysis; activating grouped widgets as a group widget; converting a received event into an event related to a configuration widget of a group widget, if an event is received from a user; transmitting the converted event to a corresponding widget server; and receiving a processing result from the widget server which received the transmitted event.