A projection apparatus, comprising a light source, an optical engine, a first sensor, and a processor, wherein: the light source provides a light beam to the optical engine; the optical engine converts the light beam into an image beam and projects the image beam out of the projection apparatus; the first sensor is configured to sense an ambient temperature; and the processor is coupled to the optical engine, the light source, and the first sensor, the processor is configured to record a projection time of the optical engine, and the processor is configured to select a selected temperature range in which the ambient temperature is included from a plurality of temperature ranges according to the ambient temperature, and the processor is configured to select a selected driving program from a plurality of driving programs corresponding to the plurality of temperature ranges according to the selected temperature range to control the light source; characterized in that the processor is configured to, for each driving program of the plurality of driving programs, control the light source to turn off after a respective predetermined operating time according to the selected driving program; wherein the respective predetermined operating times are equal to a sum of a respective plurality of time intervals, and the respective plurality of time intervals at least comprise a first time interval and a second time interval; and wherein the processor is configured to control the brightness of the light beam provided by the light source in the first time interval to be greater than the brightness of the light beam provided by the light source in the second time interval according to the respective selected driving program, and the first time interval is earlier than the second time interval. the light source provides a light beam to the optical engine; the optical engine converts the light beam into an image beam and projects the image beam out of the projection apparatus; the first sensor is configured to sense an ambient temperature; and the processor is coupled to the optical engine, the light source, and the first sensor, the processor is configured to record a projection time of the optical engine, and the processor is configured to select a selected temperature range in which the ambient temperature is included from a plurality of temperature ranges according to the ambient temperature, and the processor is configured to select a selected driving program from a plurality of driving programs corresponding to the plurality of temperature ranges according to the selected temperature range to control the light source; characterized in that the processor is configured to, for each driving program of the plurality of driving programs, control the light source to turn off after a respective predetermined operating time according to the selected driving program; wherein the respective predetermined operating times are equal to a sum of a respective plurality of time intervals, and the respective plurality of time intervals at least comprise a first time interval and a second time interval; and wherein the processor is configured to control the brightness of the light beam provided by the light source in the first time interval to be greater than the brightness of the light beam provided by the light source in the second time interval according to the respective selected driving program, and the first time interval is earlier than the second time interval.