Method for calculating degree of degradation on basis of properties of image displayed on display and electronic device for implementing same

An electronic device comprising:

• at least one sensor;
• a communication circuit;
• a display;
• and
• at least one processor operationally connected to the display, wherein the at least one processor is configured to:
• display, on the display, a watch screen including a fixed element displayed at a specified location of the display, a repeating element displayed based at least on a pre-defined rule, and a changing element associated with information obtained through the at least one sensor or received through the communication circuit;
• generate first data based on at least one of the pre-defined rule or a shape of the repeating element;
• generate second data based on at least one of the fixed element or the changing element in response to the changing element changed from a first value to a second value;
• generate first deterioration information based on the first data, the second data, and a time during which the changing element retains the first value;
• generate third data based on the fixed element and the changing element in response to the changing element changed from the second value to a third value;
• and
• generate third deterioration information by accumulating second deterioration information generated based on the first data, the third data, and a time, during which the changing element retains the second value, in the first deterioration information,
• wherein the at least one processor is further configured to generate the third deterioration information by increasing a reflection ratio of the second deterioration information depending on a time during which the second value is retained as compared with a time during which the first value is retained as the time during which the changing element retains the second value increases.