An optimizing method, a system, and a smart device to display circular patterns smoothly are provided by the present disclosure. It gets coordinate values of all points on the circular pattern. It calculates respective transparency compensation values of two adjacent points with respect to a corresponding one of the points to any coordinate in an X-axis direction and a Y-axis direction of the circular pattern using a maximum limit of the transparency as a benchmark, and then calculates a transparency compensation value of the corresponding one of the points using the transparency compensation values of the two adjacent points. Finally, it redraws all points of the circular pattern based on the calculated transparency compensation value and the RGB parameters of the corresponding one of the points.