A phase mask is designed by vortex beams and the transmissivity function of an axicon, and the plane wave is irradiated to the spatial light modulator (SLM) into which the phase mask is written. The perfect vortex beams are generated on the Fourier plane of SLM, and then the overlap between the 0 order and the ±1 order spectra on the Fourier plane is solved. A space free-control technology for perfect vortex beams is proposed. By analyzing the experimental data, the functional relationship between the spatial displacement and the adjustable factor is determined, and the control precision achieves 2.25 μm. Furthermore, by adjusting cone angle parameters of the axicon in situ, the center bright ring radius of the perfect vortex beam could be controlled freely. The quadratic functional relationship between the radius of the center bright ring and the cone angle is obtained. The perfect vortex beams, which are generated by the incident lights with wavelengths of 532 nm and 632.8 nm, are compared. Results show that the perfect vortex beam with a smaller radius can also be obtained by a longer wavelength incidence. The study is expected to inspire new applications of the perfect vortex beams in micro-particle manipulation, optical information coding, optical measurement, fiber communication based on orbital angular momentum.