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This invention discloses a method and system for inspecting the output quality of a receipt printer based on a smart terminal device, aiming to solve the problems of high subjectivity, high cost, and complex operation in existing inspection methods. The method uses a smart terminal inspection system to upload a desired effect image as a standard reference. The receipt printer receives the corresponding printing data and outputs the receipt. The smart terminal device captures the receipt image according to specifications and uploads it to the system. After preprocessing, geometric correction, feature extraction, and multi-dimensional algorithm comparison, a visual and quantitative inspection report is generated. The system includes a smart terminal inspection system and a receipt printer. The smart terminal inspection system includes modules for camera, image processing, and display, working together to achieve efficient inspection. This invention utilizes widely available smart terminal devices, requires no specialized instruments, is convenient to operate, low in cost, and provides objective and accurate inspection results, making it suitable for batch quality inspection needs in multiple scenarios.