Exoplanets are well detected in different stars, including binary or even triple/quadruple star systems. This is a good way to check if current planet formation and migration theories are available in these systems. This talk will focus on two issues, i. e. planets in circumbinary systems and planets in open clusters. 19 circumbinary planets have hitherto been detected, 9 of them are detected by Kepler. We present a phenomena called "tight transit events", i. e. transits with very small interval for transiting planets around binaries. The special characteristics of the light curves during "tight transit events" will benefit us to know more information about these systems for observation in the future. Further more, most stars formed in clusters, and planet formed in such environments of clusters. However, few planets are detected in clusters. We present a more real dynamical environments in open clusters, and check the orbital architecture for multi-planetary systems. We conclude how the environments influence the stability and occurrence rate of planet in open clusters.