M31作为本星系群最重要的成员和距离我们最近的典型旋涡星系，它及其临近子结构的化学组成和运动学信息对理解M31、M33、本星系群乃至整个星系形成与演化图景至关重要。M31/M33及其临近区域背景类星体的搜寻和证认为这一研究提供了强有力的辅助手段：一、背景类星体作为天体测量参考系，是将来研究M31/M33及其子结构微弱自行的理想参照物；二、低红移背景类星体的吸收线光谱分析能帮助我们探测M31/M33及其比较延展尺度上星际/星系际介质的化学分布、组成和运动学信息。采用现有多波段测光，利用郭守敬望远镜(LAMOST)搜寻M31/M33及其临近区域范围内背景类星体的工作已经展开，目前已新发现500多颗类星体，这方面的先期工作请见Huo et al. 2010，2013。在今后的3年中，我们预计将在M31/M33及其临近约400平方度区域将发现3000颗类星体。

M31 is the most important member of the Local Group, and the nearest typical spiral galaxy to our Milky Way. The chemistry and the kinematics of M31/M33 and those substructures are key to understand M31,M33,the Local Group and even the whole galaxy formation and evolution theory. Background quasars in the vicinity of M31/M33 can be served as the powerful tool to investigating the properties of M31/M33 and its related substructures: 1) quasars behind M31 can be served as perfect astrometric refercence for the measurements of the minute proper motion of M31/M33 and those related substructures; 2) the absorption line systems in low-redshift background quasar spectra allow one to probe the distribution, chemical composition and kinematics of the interstellar/intergalactic medium of M31/M33 and the Local Group. Based on the available multi-band photometric data, searching for the background quasars in the vicinity of M31/M33 with the Guoshoujing Telescope (LAMOST) has been carried out, more than 500 background quasars have been newly discovered, see Huo et al. (2010, 2013) for more detail. In the next 3 years, we expected 3000 quasars will be discovered by LAMOST in the 400 sq. deg area region of the vicinity of M31/M33.