The present invention relates to technology for controlling a user interface (UI) of a wearable device, and a system for properly controlling a UI based on characteristics of a wearable device according to an embodiment of the present invention which includes a wearable device and a terminal device configured to interwork with each other, wherein the wearable device provides device specification information when interworking with the terminal device, and the terminal device sets a UI and situation notification method to be controlled in response to a notification situation, based on the device specification information, and uses the set situation notification method to control the set UI in response to the notification situation.