Current developments of high power laser diode-pumped solid-state lasers such as disk rod laser, disk/slab laser, fiber laser and heat-capacity laser at home and abroad are investigated. Focusing on the problem of thermal effects in solid-state lasers which limits the increment of the output average power and degrades the output beam quality, the advantages and disadvantages of kinds of lasers are compared. Current techniques to decrease or compensate for the effects of the useless heat are summarized, and the probable techniques to reduce the laser′s thermal effects are pointed out.