Method and system for processing data obtained by annual salary

The invention discloses a method and a system for processing annual salary data. The method comprises the following steps of: submitting integrated metadata and annual one-time bonus metadata to a Web tax service end through a security interface; and processing the received metadata obtained through integration and the annual one-time bonus metadata through the Web tax service end, obtaining an annual tax payable amount T, and determining a first interval range corresponding to a salary tax payable amount A divided by the annual tax payable amount T when determining a minimum value of the total amount of personal income tax based on an exhaustion algorithm, and a second interval range corresponding to the one-time annual final prize tax payment amount B divided by the annual tax payment amount T; respectively taking the first interval and the second interval as optimal planning intervals of the payable amount A of the salary and the payable amount B of the one-time annual award fund, wherein the payable amoun