**4. Conclusions**

In this chapter, the arsenomolybdates are presented, and the attention is mainly focus on photocatalytic degradation of organic dyes. Various strategies are summarized and discussed based on the knowledge of synthesis, structure and photocatalytic properties for arsenomolybdates, which reflects the major directions of recent research in this field. There are vast research opportunities as new arsenomolybdates architectures are discovered in future; the great effort to promote the development of arsenomolybdates is needed to reduce the gap with commercial applications.
