The embodiments of the present disclosure provide a display driving system and a display apparatus. The display driving system comprises: a voltage adjustment circuit comprising an analog display signal input terminal, a trigger signal input terminal and an analog display signal output terminal. The voltage adjustment circuit is configured to adjust a blue voltage signal inputted to the analog display signal input terminal, in response to an adjustment trigger signal inputted to the trigger signal input terminal, to lower a light emission brightness corresponding to the blue voltage signal, and output the adjusted blue voltage signal via the analog display signal output terminal. In the display driving system, the adjustment trigger signal is inputted to the trigger signal input terminal and the blue voltage signal inputted to the analog display signal input terminal is adjusted, such that the blue voltage signal outputted from the analog display signal output terminal has a reduced amplitude.