An embodiment of the invention discloses a network platform fund anti-stealing method and a network platform fund anti-stealing system. An account on a network platform corresponds to N fund cards, wherein N is a positive integer, and a fund amount of the account includes principals provided by the N fund cards and income amounts generated by the principals. The network platform fund anti-stealing method comprises the steps of: receiving fund withdrawing information; determining an amount to be withdrawn according to the fund withdrawing information; determining that the amount to be withdrawn is less than or equal to the income amounts; and transferring the amount to be withdrawn into the first fund card of the N fund cards. According to the network platform fund anti-stealing method and the network platform fund anti-stealing system provided by the embodiment of the invention, one-to-one correspondence operation is performed on the fund cards and funds transferred into the account from the cards through comparing a difference value between the amount to be withdrawn and the income amounts, so that the user can transfer the principals and incomes into a bound bank card together safely on the network platform, thereby effectively improving the user experience.