The JGD single crystal furnace is a laser-based single crystal furnace featuring automatic diameter controlfor weighing. Unlike other single crystal furnaces that use power or temperature as control objectives, this furnaceemploys high-precision electronic scales as sensors and uses crystal weight as the control objective. The controlsoftware of the JGD single crystal furnace innovatively compares the theoretical weight of the crystal with the weightmeasured by the electronic scales to establish a closed-loop negative feedback system. By applying differential, integral,and PID theory, the software achieves intelligent control of the crystal growth process, automatically managingthe growth of various high-quality crystals such as InSb, YAG, LYSO, TGG, and Ti: Al2O3 without humanintervention. Additionally, the software collects growth process data using an SQLServer database for big data analysisand integrates remote monitoring functions, thereby improving production efficiency.