The present invention provides a method and a system for loading a file. The method includes: a browser sends a pre-download request to a pre-publish server beforehand, receives a download link fed back by the pre-publish server, downloads a file from a data source server through the download link, and sends a first file identifier of the pre-downloaded file and a user terminal address of a user terminal that runs the browser to a query server for storing. The browser receives a load instruction that carries a second file identifier of a file, and queries whether the file is stored locally, if the file is stored locally, reads the file locally, if the file is not stored locally, sends the load instruction to the query server, receives a user terminal address returned by the query server, sends the load instruction to a user terminal corresponding to the user terminal address according to the received user terminal address, and receives a file fed back by the user terminal.