A work information management system comprising: - a terminal device, and - a sensor device, wherein the terminal device 1 includes a receiver, a signal analyzing unit, a display unit, and a data storage unit, wherein the sensor device includes an object provided with a wearable sensor that is worn by a worker and a transmitter, wherein the sensor device acquires sensor data from the wearable sensor, and the transmitter transmits the sensor data to the terminal device; the wearable sensor acquires, from the object, work data including identification information of the object, a place of the object, a user of the object, and time when the object is operated, and transmits the acquired work data and the sensor data to the terminal device, the terminal device determines a work content associated with certain motions or positions of the worker based on the sensor data and the work data received from the wearable sensor and a pattern library indicating a pattern of sensor values stored for each wearable sensor and each work content, and outputs a determination result on the display unit, and the wearable sensor senses, from the object, the sensor data obtained by touching a sensing assistance with concave-convex shaped protrusions within a range of a predetermined position attached to the object. - a terminal device, and - a sensor device, wherein the terminal device 1 includes a receiver, a signal analyzing unit, a display unit, and a data storage unit, wherein the sensor device includes an object provided with a wearable sensor that is worn by a worker and a transmitter, wherein the sensor device acquires sensor data from the wearable sensor, and the transmitter transmits the sensor data to the terminal device; the wearable sensor acquires, from the object, work data including identification information of the object, a place of the object, a user of the object, and time when the object is operated, and transmits the acquired work data and the sensor data to the terminal device, the terminal device determines a work content associated with certain motions or positions of the worker based on the sensor data and the work data received from the wearable sensor and a pattern library indicating a pattern of sensor values stored for each wearable sensor and each work content, and outputs a determination result on the display unit, and the wearable sensor senses, from the object, the sensor data obtained by touching a sensing assistance with concave-convex shaped protrusions within a range of a predetermined position attached to the object. wherein the terminal device 1 includes a receiver, a signal analyzing unit, a display unit, and a data storage unit, wherein the sensor device includes an object provided with a wearable sensor that is worn by a worker and a transmitter, wherein the sensor device acquires sensor data from the wearable sensor, and the transmitter transmits the sensor data to the terminal device; the wearable sensor acquires, from the object, work data including identification information of the object, a place of the object, a user of the object, and time when the object is operated, and transmits the acquired work data and the sensor data to the terminal device, the terminal device determines a work content associated with certain motions or positions of the worker based on the sensor data and the work data received from the wearable sensor and a pattern library indicating a pattern of sensor values stored for each wearable sensor and each work content, and outputs a determination result on the display unit, and the wearable sensor senses, from the object, the sensor data obtained by touching a sensing assistance with concave-convex shaped protrusions within a range of a predetermined position attached to the object.