In order to digitize the radiotherapy quality control data, convenient to carry on the dynamic quantitative analysis to the equipment condition, this paper presents a low-cost open radiotherapy quality control platform based on REDCap. The platform uses the REDCap data acquisition system as a carrier to achieve the digital storage of this data, anytime, anywhere data entry, and can be easily derived for data analysis by creating REDCap research projects and inputting radiotherapy quality control data. It is proved that REDCap can be used in the construction of radiotherapy quality control platform.