In order to develop low-cost and high-performance vortex generation devices, this paper designs an all-dielectric integrated metasurface antenna system operating in the 6G terahertz communication window, with a focus on investigating the electric field distribution characteristics of focused vortex waves carrying different topological charges. Under physical size constraints, a metasurface capable of generating focused vortex beams is designed by controlling the propagation phase of terahertz waves, significantly enhancing the design flexibility of the antenna. The integrated metasurface antenna is fabricated using stereolithography 3D printing technology. Finally, an imaging system is constructed to analyze the electric field distributions of the integrated metasurface antennas with varying topological charges. The results demonstrate that the device can effectively generate and focus vortex beams at a low cost, mitigate beam divergence, and address the stringent alignment tolerance between the metasurface and the light source. This work provides a simple and cost-effective general design method for all-dielectric integrated metasurface antennas that generate focused vortex beams, offering broad application prospects for 6G communications and high-resolution imaging.