The core component of atomic sensors is the alkali-metal atomic vapor cell, such as the atomic electric field meter, atomic gyroscope, atomic magnetometer, and atomic clock. Integrating the optical path on the glass shell of the atomic vapor cell is one of the most effective ways to realize the miniaturization of atomic sensors. Herein, to solve the problems associated with discrete optical components and low laser utilization in atomic sensors, a type of metasurface that can separate and transmit lasers with different wavelengths was designed based on the generalized Snell's law and equivalent medium theory. By integrating this metasurface with an atomic vapor cell, it can conveniently detect and process the laser passing through the vapor cell. In addition, the proposed method can improve the integration and portability of atomic sensors and provide an achievable scheme for the miniaturization of atomic sensors. Simulation analysis using finite-difference time-domain (FDTD) was conducted to excite a cesium Rydberg atom via a two-photon method. The results show that the metasurface can cause the 510-nm coupling laser to have a deflection angle of 6° without affecting the propagating direction of the 852-nm probe laser, and the transmittance of the two lasers exceeds 96.3%.