Provided are a method and a wearable device for measuring cumulative impact, and a method and a server for monitoring cumulative impact. The wearable device for measuring cumulative impact by means of a tool (hereinafter referred to as a vibrating tool), worn on the hand of a worker, for generating vibration, according to one embodiment of the present invention, comprises: a vibration detecting sensor for detecting the number and the size of vibrations transferred to the hand of the worker when the vibrating tool is operated; a memory for accumulating and saving the number and the size of vibrations detected for a predetermined time; a communication unit for transmitting, to a monitoring server, the accumulated vibration number and size saved in the memory for the predetermined time, an identifier of the vibrating tool and an identifier of the wearable device, and receiving, from the monitoring server, information relating to a risk level according to the cumulative impact; and an output unit for outputting information corresponding to the information relating to the risk level which has been received, wherein the cumulative impact results from an accumulation of the number and the size of vibrations by at least one vibrating tool, including the vibrating tool, which has been used by the worker for a specific duration.
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