Abstract: Femtosecond laser-assisted cataract surgery system has been put into clinical application for four years. It has been mainly performed in three key steps: capsulotomy, lens fragmentation, and corneal incisions. Recently, the researchers' attention has been  focused on its safety and new applications, such as  the postoperative corneal endothelial cell loss and the change of corneal thickness, postoperative anterior flare, retinal thickness changes when using the femtosecond laser compared with conventional phacoemulsification. The femtosecond laser system has been used in implanting adult BIL (bag - in - the - lens) intraocular lens by some scholars, and it also has been combined with nanosecond laser surgery system, making the whole process of cataract surgery in completely "bladeless". This article compares the four systems and reviews the safety, effectivity, shortness, learning curve and latest applications of femtosecond laser-assisted cataract surgery system.