The present invention provides an electric roller mechanism comprising an electric roller platform and a platform support frame. The electric roller platform comprises a square bottom plate. Roller bases are fixed at four sides of the bottom plate. A universal wheel mounting bracket is fixed at the center of the bottom plate. The roller bases are equipped with rollers. The universal wheel mounting bracket is equipped with universal wheels. The platform support frame comprises a square chassis frame, and the four corners of the chassis frame are equipped with support rods. A square tray is fixed on the support rods. The electric roller platform is installed to the platform support frame through the tray. The invention provides the electric roller mechanism, the direction of the material which is transported in an assembly line can be changed through the rollers and a universal roller platform, and the electric roller mechanism has the advantages of convenience in use and high stability and reliability and is suitable for the steering transmission of the material in the assembly line.