A method for controlling a boom of a crane, comprising: collecting in real time, by a reference station, satellite positioning information as a reference station current measurement value, and transmitting the reference station current measurement value to a first mobile station and a second mobile station, characterized in that the reference station is disposed at the rotating shaft center of the crane, the first mobile station is disposed at the hoisting position of the hoisted object, and the second mobile station is disposed at the vehicle head of the crane; collecting in real time, by the first mobile station, satellite positioning information as a first mobile station current measurement value, performing real-time kinematic processes on the reference station current measurement value and the first mobile station current measurement value to obtain relative coordinate information of the first mobile station, and transmitting the relative coordinate information of the first mobile station to a crane resolving unit; collecting in real time, by the second mobile station, satellite positioning information as a second mobile station current measurement value, performing real-time kinematic processes on the reference station current measurement value and the second mobile station current measurement value to obtain relative coordinate information of the second mobile station, and transmitting the relative coordinate information of the second mobile station to the crane resolving unit; determining, by the crane resolving unit, the boom extension length, the boom pitch angle and the boom rotating angle based on the relative coordinate information of the first mobile station and the relative coordinate information of the second mobile station, and transmitting the boom extension length, the boom pitch angle and the boom rotating angle to a crane controller; controlling, by the crane controller, based on the boom extension length, the boom pitch angle and the boom rotating angle, the boom to move to the hoisting position of the object to hoist the object. collecting in real time, by a reference station, satellite positioning information as a reference station current measurement value, and transmitting the reference station current measurement value to a first mobile station and a second mobile station, characterized in that the reference station is disposed at the rotating shaft center of the crane, the first mobile station is disposed at the hoisting position of the hoisted object, and the second mobile station is disposed at the vehicle head of the crane; collecting in real time, by the first mobile station, satellite positioning information as a first mobile station current measurement value, performing real-time kinematic processes on the reference station current measurement value and the first mobile station current measurement value to obtain relative coordinate information of the first mobile station, and transmitting the relative coordinate information of the first mobile station to a crane resolving unit; collecting in real time, by the second mobile station, satellite positioning information as a second mobile station current measurement value, performing real-time kinematic processes on the reference station current measurement value and the second mobile station current measurement value to obtain relative coordinate information of the second mobile station, and transmitting the relative coordinate information of the second mobile station to the crane resolving unit; determining, by the crane resolving unit, the boom extension length, the boom pitch angle and the boom rotating angle based on the relative coordinate information of the first mobile station and the relative coordinate information of the second mobile station, and transmitting the boom extension length, the boom pitch angle and the boom rotating angle to a crane controller; controlling, by the crane controller, based on the boom extension length, the boom pitch angle and the boom rotating angle, the boom to move to the hoisting position of the object to hoist the object.