For the high-power solid-state laser, the cooling technology has become one of the key techniques for its development. This paper reviews the current development of cooling technology dealing with the high-power solid-state laser, both in use and in the experimental stage, which includes the liquid convection heat exchange in microchannel, diamond cooling, spray cooling and micro-heat-pipe cooling. On the basis of our recent research and the summarization of the development, we propose two promising cooling methods, boiling heat exchange in microchannel and liquid nitrogen cooling, and discuss the recent progress of theoretical studies on the two techniques.