The plug-in card-type temperature control box is an intelligent temperature control device developed specifically for the injection-molding industry of hot runner molds. It adopts a modular plug-in card-type integrated design, with multiple independent temperature-control channels available. It is suitable for all kinds of single-point, multi-point, multi-cavity pin-valve hot runners and open-type hot runner molds. The whole machine features a compact structure, convenient installation, precise temperature control, and extremely simple maintenance. It is widely used in injection-molding production scenarios such as medical consumables, precision plastic parts, packaging, and automotive parts, and is a core temperature-control device standard-equipped for hot runner systems.