A terminal provided in the present disclosure, acquires values of one or more monitoring parameters. The terminal sets, according to the monitoring parameter, a blue light output value of a to-be-adjusted pixel displayed on a screen of the terminal when a value of at least one of the monitoring parameters meets a preset rule corresponding to the monitoring parameter, where the blue light output value is less than an original blue light output value of the to-be-adjusted pixel. The screen of the terminal displays the to-be-adjusted pixel according to the blue light output value such that the terminal can set, according to the monitoring parameter, the blue light output value of the to-be-adjusted pixel displayed on the screen of the terminal, and therefore the blue light can be adjusted intelligently, and an objective of vision protection without affecting user experience is achieved.