Object location estimating method with timestamp alignment function and related object location estimating device

An object location estimating device with a timestamp alignment function, comprising:

• a receiver adapted to acquire frames captured by at least one camera;
• and
• a processor electrically connected to the receiver and adapted to acquire a plurality of first frames captured by a first camera, to set a first predetermined point of time, to define a first previous frame and a first next frame closest to the first predetermined point of time from the plurality of first frames, to acquire a first previous coordinate value of an object within the first previous frame and a first next coordinate value of the object within the first next frame, and to utilize the first previous coordinate value and the first next coordinate value to compute a first estimation coordinate value of the object at the first predetermined point of time.