Quantile determination system, method, equipment and medium

The embodiment of the invention provides a quantile determination system, method, device and medium, the system comprises a central device and at least two joint devices, during each round of average quantile calculation, the joint devices determine a first quantile according to information used for calculating an average quantile and a numerical value set of a to-be-determined quantile carried in a determination instruction, the first quantile is adjusted by using a preset random number to obtain a second quantile and the second quantile is sent to the central equipment, so that other equipment cannot obtain own real numerical values, and the preset random number of the other uniquely corresponding combined equipment is opposite to that of the uniquely corresponding combined equipment; after receiving the second quantile sent by each joint device, the center device determines an average quantile according to the second quantile, if it is determined that calculation of the average quantile meets the convergen