Perovskite,a proton conducting ceramic material with high proton conductivity,became one of the preferred materials for energy conversion and storage devices.Due to the characteristics of fire resistance and easy cracking,the processing technology of this kind of material was complicated and limited.One of the keys to realize the wide application of energy devices based on this kind of materials was to solve its low-cost,fast,efficient and non-destructive preparation process.This work enabled fast,efficient and cost-effective fabrication of high energy density integrated devices by developing a novel laser 3D printing technology that integrates micro-extrusion-based 3D printing with accurate and rapid laser machining(sintering,drying,cutting and polishing)and applying it to proton conductor energy devices.The self-developed proton ceramic slurry was printed layer by layer according to the designed model through 3D printing.Rapid drying and in-situ reaction sintering of the printing layer were carried out by CO₂ laser.Picosecond laser was used for micro-nano processing of the machining layer,such as polishing and cutting.Through the experiment,the method successfully 3D printed the proton conductor energy device;the original powder was sintered by laser reaction and the perovskite crystal structure proton ceramics were obtained;the microchannel energy device was rapidly and accurately machined by picosecond laser;the fuel cells were fabricated and the fabricated devices had the same performance as the reported traditional processes,such as the electrolyte conductivity of ~6.95×10^-3 S/cm.The results showed that the technology platform proposed in this work can not only efficiently and accurately manufacture proton ceramic materials and energy devices,but also realized the device with complex structure that cannot be fabricated by the traditional process.At the same time,it created the possibility for the future practical application of energy devices based on proton conductor materials.