The point target location based on a moving visual platform was studied. After introducing the visual location method, the sight-line restriction of the collinear equation was analyzed. The error impact of view-line angle vector to the point target location was deduced in the view-line associated coordinate system. Multitime measurements were also analyzed in the location error analysis. Based on the minimization of the target location error, the optimal maneuver trajectory of the observer platform was designed. Using a method that is simpler and easier to understand, the results obtained from the proposed method are the same as those from the method by maximizing the determinant of the Fisher information matrix. Simulations and tests were performed, and results show that the target location error analysis and the platform optimal maneuver trajectory design are valid.