This paper proposes a new method of spot detection and tracking for the sake of reducing the effect of atmospheric turbulence on the level of atmospheric wireless laser communication link APT subsystem and enhancing the robustness of spot detection algorithm in strong noise. In this method the sequence information distributions are adopted as the detection and tracking characteristic parameters to fit the circle centre and estimate the spot energy centre according to the fitting equation, i.e. to make the MSE minimum by following the principles of the least squares. The use of this method can play a strong role in compensating the obstruction of atmospheric turbulence and background to effectively restrain the detection error in a small range, and has a strong aim at the strong turbulence environment, which provides an effective solution to the atmospheric turbulence for the level of wireless laser communication link. In this method the equalization time-domain means with robustness is used to avoid the difficult problem of over-strong noise led into by the turbulence. This paper performs an analysis of the advantages and disadvantages of this method from the perspective of engineering and at the same time makes a prospect for the bottlenecks.