A therapeutic thermal energy measuring system, method and application for a meridian thermal therapy device. The therapeutic thermal energy measuring system for a meridian thermal therapy device comprises: a time setting module for setting a time; a temperature setting module or an intensity level setting module for setting a temperature or an intensity level; a therapeutic thermal energy measuring module for measuring therapeutic thermal energy on the basis of a preset time and a preset temperature or intensity level, and outputting a result, and/or performing real-time measurement of therapeutic thermal energy on the basis of a preset temperature or intensity level and cumulative working hours of a treatment head of the meridian thermal therapy device, and outputting a result. The therapeutic heat energy measuring system can solve a bottleneck problem of having no way of quantizing therapeutic thermal energy in meridian thermal therapy.