The invention discloses an Internet based golf ball hit simulation system. The flight tracking sensing device sensing of a flight path of golf ball hit in a hit area can be recorded; a virtual golf court and a flight image of a ball can be displayed on a picture through an imagination unit; data are input to a control portion through a plurality of induction units; analysis and calculation are performed through the control portion; the flight distance and the stop position of the golf ball are calculated through the control portion according to the data; an input signal is reflected to a three-dimensional image of the golf court, wherein the three-dimensional image is tracked along the flight; projection is performed on a projector through the imagination unit so as to enable the three-dimensional image of the golf court to be displayed on a projection screen. Accordingly, players can feel the golf sport visually and the effect that the players play a golf game in a real golf court is achieved. The Internet based golf ball hit simulation system can be used for performing effective instant diagnosis on the height and the posture of one of the players, providing the reaction, action and action frequency of the relevant information players, providing a complete profile, improving the hit action of every player and achieving accurate in-place of the hit action eventually.