A light source system and a display apparatus comprising the light source system are provided. The display apparatus comprises the light source system and an imaging system. The light source system is configured to provide a light for imaging. The light source system comprises a mirror wheel and at least two light source modules, configured to provide at least two light beams respectively. These light beams are lit up according to a predetermined sequence. After being reflected by or directly passing through the mirror wheel, the light beams form a continuous light, traveling into the imaging system for imaging on a screen.