An alarm system and method include setting an alarm password corresponding to the bank account and setting a restricted amount of the bank account, acquiring account information of the bank account if the alarm password is received, and sending the alarm message including the account information to a receiving device of one or more emergency dispatchers. The alarm system and method further include displaying the restricted amount on an account interface provided by a bank server if the account balance is greater than the restricted amount, or displaying the account balance on the account interface if the account balance is less than the restricted amount.