1. A method for approximating a curve implemented on an apparatus comprising a subdivision module and a coordination calculation module, the subdivision module and the coordination calculation module including at least one processor, the method comprising: acquiring, via a subdivision module, number information of subdividing points for subdividing a curve needed to be approximated based on coordinate information of control points of the curve; acquiring, via a coordinate calculation module, coordinate information of the subdividing points based on the number information of the subdividing points and the coordinate information of the control points, wherein the subdividing points are points on the curve; and connecting the subdividing points with straight lines based on the coordinate information of the subdividing points, wherein acquiring the number information of the subdividing points comprises: acquiring a curve function of the curve based on the coordinate information of the control points; acquiring a relationship between an area difference and a subdividing step size based on the curve function, wherein the area difference is the difference between the area of a curve segment corresponding to the subdividing step size on the curve with respect to an X coordinate axis and the area of a line segment of two points corresponding to the subdividing step size on the curve with respect to the X coordinate axis; calculating a subdividing step size corresponding to a set area difference based on the relationship between the area difference and the subdividing step; and calculating the number information of the subdividing points using the subdividing step size corresponding to the set area difference, wherein calculating a subdividing step size corresponding to a set area difference based on the relationship between the area difference and the subdividing step size comprises dividing the set area difference by a coefficient of the relationship between the area difference and the subdividing step.