1. A computer-implemented method for automatically generating variable sequence data, comprising the steps of: acquiring a customized ary set by a user for generating variable sequence data, and characters included in the customized ary; converting, by a processor, the characters included in the customized ary into a character array in which the characters included in the customized ary are arranged in sequence to represent values in the customized ary; acquiring parameters set by the user for generating the variable sequence data; pre-processing, by the processor, the parameters; and generating, by the processor, the variable sequence data according to the character array converted from the characters included in the customized ary and the pre-processed parameters; wherein the parameters comprise an initial value, an amount of digits, a total amount of data, a step length, and a variation mode of the variable sequence data, wherein the pre-processing, by the processor, the parameters comprises: converting the initial value into a customized ary data in form of a character array; and converting the step length into a customized ary data in form of an integer array and complementing the integer array according to the amount of digits; wherein the variation mode is ascending or descending; wherein the generating, by the processor, the variable sequence data according to the character array converted from the characters included in the customized ary and the parameters having been pre-processed comprises: when the variation mode is ascending, sequentially adding the customized ary data converted from the step length to the customized ary data converted from the initial value to obtain a plurality of variable sequence data until an amount of the variable sequence data reaches the total amount of data; when the variation mode is descending, sequentially subtracting the customized ary data converted from the step length from the customized ary data converted from the initial value to obtain a plurality of variable sequence data until an amount of the variable sequence data reaches the total amount of data.