The invention discloses an information management system of a crane. The information management system of the crane comprises a crane operating system, a data recording system, a fault monitoring system, an equipment management system, a component life monitoring system and a fault diagnosing and analyzing system, wherein the component life monitoring system records the operating time of the important components of the crane in real time, monitors the relevant environments in which the components are positioned and the operating situations of the components by means of a sensing element, i.e. monitoring the operating time, the relevant environments and the operating situations of a contactor, a brake, a motor, a frequency converter and a voltage regulator in the crane, and acquires the residual service life of the components by carrying out difference value computing on the known service life of the components and the monitoring results; and the fault diagnosing and analyzing system is used for calling expert opinions corresponding to an event input by field staff from a database and displaying the expert opinions for the field staff through a display device. The system of the invention has strong logic control performance, high reliability and favorable compatibility and generality, and is suitable for being widely popularized in hoisting equipment.