The invention belongs to the field of application of heating ventilation air conditioning technologies, relates to an indoor thermal comfort regulating and system energy saving process and particularly relates to a solar phase change heat storage and capillary network radiation heating system. The solar phase change heat storage and capillary network radiation heating system consists of a solar heat collecting module (I), a phase change heat storage module (II), a capillary network radiation heating module (III) and other auxiliary devices, wherein the solar heat collecting module (I) includes a solar heat collector (1); the phase change heat storage module (II) includes a phase change heat storage and release device (2); the capillary network radiation heating module (III) includes a capillary network low-temperature radiation heating network (7); and other auxiliary devices comprise an auxiliary heater box (6), a heat-insulating water storage tank (8), a circulating water pump (9), a pipeline tee joint (10), a pipeline tee joint (14), a pipeline tee joint (15), a cut-off valve (3), a cut-off valve (4), a cut-off valve (5), a cut-off valve (11), a cut-off valve (12), a cut-off valve (13) and the like; and the functions of saving energy and raising the thermal comfort of an indoor environment are achieved by fully utilizing solar resources.