A versatile metasurface platform based on phase change materials (PCMs) is provided to realize dynamic switching between edge detection and imaging without the assistance of a 4f imaging system. The metasurface consists of a periodic arrangement of unit structures which consists of a Ge₂Sb₂Se₄Te₁(GSST) nanofin on a silicon substrate. The dynamically switchable performance results from the combination of the geometric phase and two independent propagation phases that are provided by the composed phase-change material meta-atoms in amorphous and crystalline states. The average cross-polarized transmission coefficients are 0.77 and 0.42 in the amorphous and crystalline states. In order to verify the feasibility of the design, simulation and theoretical calculation of the designed switchable metasurface are carried out in crystalline state and amorphous state respectively, which show excellent imaging and edge detection results. The proposed metasurface and its working principle have potential applications in biomedical imaging and defect detection.ect detection.