To improve the photocatalytic activity and electrochemical performance, WO3 quantum dots (WO3 QDs) were used to modify GO/TiO2 (GOT) composites by sol-gel method, and the resultant GO/WO3/TiO2 (GOWT) composites were characterized. Experimental results show that WO3 QDs can enhance photocatalytic activity of GOT composite under visible light, in which its degraded efficiency for Rhodamine B (RhB) is about three times as that of GOT composite. Furthermore, GOWT composite possess excellent electrochemical performance. The enhanced photocatalytic activity is attributed to the special band gap structure and excellent electrochemical properties of WO3 QDs.