Query method based on big data

The invention provides a query method based on big data. The method comprises the following steps: storing an image file into an image library of a distributed file system; preprocessing the image file, and extracting an image characteristic; establishing a characteristic index for the extracted characteristic, and storing an index file and the image file into a distributed file database; and when a user submits a query request to a system, a user interface carries out characteristic extraction on submitted living examples or the image characteristic, carries out similarity comparison with the image characteristic in a characteristic index database and then sends a matching result to the user. The invention provides the query method based on the big data, a storage and retrieval process of the image data is optimized through the distributed system, retrieval efficiency is improved, and performance bottlenecks are overcome.