Most of the fish are ectotherms which live in the water for the whole life,so temperature is the important abiotic factor which can influence the growth and development of fish. When temperature changing, fish won't reduce the environment stress by using behavioral thermoregulation like endure,boycott or preference rather than adaptable genovariation. The review summarize the recent study on fish behavioral thermoregulation,comparing their behavioral change of habitat selection,swimming,feeding and breeding migration of different species,allogeneic age and the same kind and age fishes. And also analyze the possible internal mechanism which can course the difference,as well as the research progress of the Heat Shock Protein( HSPs) and epigenetics effect on survival. The article expound the behavior of thermoregulation is a complex and comprehensive selection behavior based on external environmental conditions and their physiological needs to maximize the advantage of thermoregulation. In order to further understand the effect of global climate change on fish,the further on research of fish thermoregulation behavior and its mechanism are needed.