The invention discloses a self-powered smart water cup with functions of temperature displaying and intraday water intake recording. The self-powered smart water cup comprises a cup cover and a cup body, the cup body comprises a shell and an inner container inside the shell, and a heat preservation layer is formed between the shell and the inner container. The smart water cup further comprises a thermoelectric power generation module, a temperature sensor, an acceleration sensor, a gyroscope, a control circuit, a Bluetooth module and a temperature display screen. The thermoelectric power generation module, the temperature sensor, the acceleration sensor, the gyroscope, the control circuit and the Bluetooth module are arranged in the heat preservation layer, and the temperature display screen is arranged on the outer surface of the shell. The control circuit is respectively connected with the thermoelectric power generation module, the temperature sensor, the acceleration sensor, the gyroscope, the temperature display screen and the Bluetooth module. The thermoelectric power generation module is respectively connected with the temperature sensor, the acceleration sensor, the gyroscope, the control circuit and the Bluetooth module to supply power. The smart water cup is capable of converting thermal energy into electric energy supplied to other internal circuits of the display screen and the like, so that energy saving and environment friendliness are realized. In addition, the smart water cup is capable of recording intraday water intake to remind a user of healthy water drinking.