The development and applications of flexible materials largely depends on the wrinkles of thin films, which may significantly affect their physical and chemical properties. On the contrary, inducing wrinkles/ripples in 2D materials usually is based on mechanical or thermal approaches, while optical triggering ripples has been eye-catching during recent years. Nonetheless, theoretical mechanisms on photoinduced rippling remain largely under-explored, so that a fundamental understanding is strongly required. In order to provide a possible explanation, we collabrate with Prof. Mao (PKU) and Prof. Zhang (USTC) to form a basic theory on light-rippling coupling, which is based on both quantum mechanical approaches and continuum mechanical model. By performing constrained-DFT calculations, we illustrate such an effect in 2D hexagonal nitride sheets, and disclose scaling relationship between energy flux and rippling shape. Our work has just appeared on Nano Letters at https://pubs.acs.org/doi/10.1021/acs.nanolett.2c03238.