The present invention relates to the technical field of cloud computing and relates to a standardized cloud radiotherapy planning method, a storage medium, and a system. The method comprises the following steps: (1) patient data is uploaded to a master cloud server (S210), where the patient data comprises a patient image and medical order data; (2) a target area is delineated on the basis of the patient image (S220); (3) the master cloud server assigns a computation task to a controlled computer, the controlled computer uses a standard radiotherapy equipment mode to compute a radiotherapy plan for a patient, thus generating a standard radiotherapy plan (S230); and, (4) a specific radiotherapy plan matching specific radiotherapy equipment is generated on the basis of the standard radiotherapy plan. The method provided in the present solution prevents a delay in treatment time for the patient and idling of treatment resources when a certain type of radiotherapy equipment in a hospital is malfunctioning while other radiotherapy equipment is idling, also balances differences in levels of treatment provided by physicians from different hospital campuses or regions, and also reduces work load for oncologists and medical physicist.