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A method of Adaptive image enhancement on satellite is proposed to solve the problem of Hysteresis and complexity, which is caused by remote sensing image enhancement on the ground, and in order to achieve real-time and self-adaptive of image enhancement, this paper proposes a new Laplace filtering algorithm based on adaptive linear stretch. On the basis of the Laplace filter, enhance the contrast and edge of the image with adaptive parameters A and B. The algorithm is simple and has small amount of computation. A platform is established with FPGA as the core of the hardware and then verifies the feasibility of the algorithm by pipelining processing of two images. The results show that the information entropy improved 10.21% by using this algorithm, and the visual effects is better than the other algorithms. The operation speed of an image is 79.6ms. It meet the real-time requirements of adaptive image enhancement on satellite, we achieved the expected results.