Gravity and magnetic data processing method for use in geological resource exploration and system thereof

The invention discloses a gravity and magnetic data processing method for use in geological resource exploration and a system thereof. The method comprises the following steps: acquiring first potential field data and first gradient data of an observation face, performing upward continuation on the first potential field data and the first gradient data by adopting a wave-number domain algorithm toobtain second gradient data, third gradient data and second potential field data, and determining third potential field data by using a four-order explicit Milne method according to the first gradient data, the second gradient data, the third gradient data and the second potential field data; calculating fourth gradient data by using an ISVD (Integrated Second Vertical Derivative) method according to the third potential field data; and correcting the third potential field data by using a four-order implicit Simpson method according to the fourth gradient data, the first potential field data,the first gradient data an