In order to meet the needs of deep-sea imaging devices in China, a whole deep-sea wide-field-of-view optical imaging system was designed based on the aberration characteristics of an underwater optical system. According to the operating environment of the deep-sea system, the optical parameters and structural forms were analyzed. A sample optical design characterized by miniaturization, low cost, and high performance was completed using common glass and spherical lens. The energy utilization of the optical system was improved by controlling the light angle. With YAG transparent ceramics as a material for anti-compression window, the deformation and anti-compression thresholds were obtained by finite-element mechanical analysis and simulation. Analysis of the window and supporting structure using ANSYS software suggests that the design met the requirements for use in 11,000 m whole deep-sea environment (110 MPa). The operating band of the optical system is 410~630 nm, the field-of-view angle reaches 80°, the relative aperture reaches 1/2.8, and the MTF of the full field-of-view>0.3 (@91 lp/mm). The imaging quality of the system and the anti-compression performance of the optical window meet the needs of deep-sea imaging for scientific investigation.