Strehl ratio is often used as a method for evaluation of the Fourier telescope imaging quality. This method computes the correlation of the reconstructed image and the ideal image to evaluate the image quality, which is mainly applicable in the computer simulation analysis. However, the object to be observed may be unknow in the real world, which means there is no ideal image for use. Based on laboratory imaging data, the feasibility of the non-reference image evaluation method applied to Fourier telescopy is proposed and analyzed. The gray mean grads (GMG) method and Laplacian Sum(LS) are adopted to describe how much detail information the reconstructed image has. For the same object, Employ Strehl ratio and GMG, LS to evaluate the simulated image and the laboratory imaging result, respectively. Statistical results show that the two kinds of evaluations are identical in changing tendency. It proves the GMG and LS methods are applicable in Fourier telescopy as a non-reference image evaluation.