Abstract: A file uploading method with a function of abstracting index information in real time and a web storage system using the same are provided. The file uploading method includes: performing a data filtering on an upload target file transmitted from a user through an online network; abstracting text information as index information of the filtered upload target file; if the upload target file is not a text file, abstracting index information by abstracting text information from the filtered upload target file or converting the file into a text format by using specific information convertible into a text format; creating an inverted file by using the abstracted text information; establishing an index database by using the abstracted text information; and storing and managing the upload target file, when the transmission of the upload target file in which the index information is stored through the index database establishing operation is completed.