The development history and research situation of Photovoltaic(PV) concentrator system are briefly reported in this paper. The concentrators and solar cells for PV system are classified in detail, then their characteristicsand technological parameters are introduced. Several solar tracking systems developed by foreign countries are described, which can improve the conversion efficiency and can reduce produce cost for PV system. Moreover, two kinds of applied tendencies about PV concentrator system are discussed, they are high magnification concentrator+tracking system and low magnification and large angle concentrator+beam splitter+multisection batteries. Finally, main problems on the commercialization of PV concentrator system are presented.