In recent years,the cyanobacteria outbreaks frequently in Taihu Lake,a lot of Cyanobacteria were salvaged,Cyanobacteria is a kind of biomass resources with variety of useful material,the use of it is worthy of in-depth study.This paper briefly outlined the comprehensive utilization of cyanobacteria in recent years home and abroad,And briefly accounted the study of the transformation of cyanobacteria into yeast using biotechnology in authors' laboratory.Also we explored the other ways of the use of cyanobacteria.