β-Ag2MoO4 with controlled morphologies were prepared by the microwave-assisted solvothermal method. β-Ag2MoO4 obtained under controlled pH exhibited the best Rhodamine-B photodegradation. β-Ag2MoO4 synthetized in ethanol medium highlight the potential application for E. coli bacteria control. The β-Ag2MoO4 properties can be attributed to the splitting of the electron–hole pairs in its complex cluster.