The present invention is to provide a robotic arm processing system, comprising: at least one robotic arm, at least one three-dimensional (3D) environment scanning device, and a processing device coupled between the robotic arm and the 3D environment scanning device. The robotic arm performs a processing procedure on at least one workpiece in a working area. The three-dimensional (3D) environment scanning device scans the working area to obtain 3D environment information of the working area. The processing device configures for generating a 3D model of the workpiece and a 3D model of the working area according to 3D environment information of the workpiece and the 3D environment information of the working area. Wherein the processing device generates a working path according to the 3D model of the workpiece and the 3D model of the working area and drives the robotic arm along the working path to perform a corresponding working procedure on the workpiece.