The present invention relates to a method to predict an impact point of a guided missile in real time. The method includes: a step of deriving a flight distance in consideration of the trace of a guided missile when inputting a flight condition; a step of analytically deriving a flight distance in consideration of a flight speed of the guided missile by linearizing the flight speed of the guided missile by section and integrating the speed for a residual flight time; a step of deriving an impact point interaction formula by combining the flight distance, in consideration of the flight speed, and the flight distance in consideration of the trace of the guided missile; a step of calculating a value of the derived impact point interaction formula; and a step of predicting an expected impact point and a residual flight time by using the calculated value of the impact point interaction formula. Therefore, the present invention is capable of enabling effective midflight.
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