The invention relates to an image reconstruction system. The system comprises a generator and a discriminator. The image reconstruction method through the system comprises the steps of 1, a low-quality image and a high-quality image of a target are input to the system; step 2, after the generator reads the low-quality image, a manual combined image is generated according to an L1 loss function; step 3, the generator adjusts the sharpness of the edge of the generated artificially combined image through a gradient loss function; 4, the discriminator reads the artificial combination image and thehigh-quality image and then generates a confrontation loss function; and 5, the generator further optimizes the artificial combined image according to the confrontation loss function. The method canhelp an ultrasonic instrument to develop towards the trend of miniaturization, so that the ultrasonic imaging technology can have higher application value in the fields of family health examination, medical treatment in an extreme environment and the like.