Method and system for detecting network quality based on a network fluctuation model

A system for detecting network quality, comprising a data processing device, a central scheduling device, and a plurality of nodes including a first node and a second node, wherein:

• the data processing device is configured to acquire file download rates of the first node for files on the second node in a target time period within a pre-defined number of historical rate-collecting cycles, determine a plurality of network quality detection parameters from the first node to the second node in the target time period based on the file download rates, wherein the plurality of network quality detection parameters include a regular network speed, a network speed fluctuation range, and a network speed lower limit, create a network fluctuation model from the first node to the second node in the target time period based on the plurality of network quality detection parameters and respective pre-defined weights, and provide the network fluctuation model to the central scheduling device;
• and
• the central scheduling device is configured to detect, according to the network fluctuation model, a network quality from the first node to the second node in the target time period.