A smart alarm module equipped for a vehicle includes a microcontroller adapted to arm the smart alarm module in response to a remote controller, a tilt sensor coupled to the microcontroller, where the tilt sensor is applied to the vehicle to sense change of angle values of the vehicle, the tilt sensor is activated to trigger an alarm when the change of angle values exceeds a predetermined value. The tilt sensor includes a register A and a register B to respectively store initial angle values produced from the tilt sensor. A calculation of |A(n)B(n+1)| is performed to check whether the tilt sensor is triggered, if positive, sends out the alarm; otherwise, stores the updated angle data of the register B in the register A. A(n) represents angle value stored in the register A at previous time, and B(n+1) represents currently updated angle value stored in the register B.