The invention provides a method for obtaining handwriting information. In the method, a five-dimensional force/moment sensor module, an embedded microprocessor module and a true-color display module which are arranged in a handwriting device are utilized. The method comprises the following steps of: firstly initializing the five-dimensional force/moment sensor module, wherein the initialization comprises power supplying, zero-point modifying and interface drive requirement and temperature compensating; acquiring numerical values output by the five-dimensional force/moment sensor, thus obtaining five-dimensional force handwriting force data; performing decoupling operation on the five-dimensional force handwriting force data, thus obtaining real-time three-dimensional handwriting vector information numerical values and two-dimensional handwriting moment vector information numerical values; and performing corresponding formula calculation, thus obtaining real-time two-dimensional handwriting coordinate information and obtaining complete handwriting information. The method can be used for solving the problems that the handwriting information cannot be completely obtained in the existing handwriting information obtaining method, therefore, the security of signature information is improved, and the method provides a new guarantee means for ensuring the information security of important document signing in e-government or contract signing in e-business, and the like.