An electric power tool system including an electric power tool and a server system, the electric power tool including: a motor; an output shaft on which a front-end tool is adapted to be mounted; a power transmission mechanism that transmits a rotational output of the motor to the output shaft; an acquisition unit that acquires physical quantity data detected while the motor is being rotated; a storage unit that stores the physical quantity data and time information related to time when the physical quantity data is acquired, mapping the physical quantity data and the time information to each other; and a tool-side transmission unit that transmits the physical quantity data and the time information to the server system, mapping the physical quantity data and the time information to identification information on the electric power tool, the server system including: a storage apparatus that stores past physical quantity data and past time information, mapping the past physical quantity data and the past time information to the identification information on the electric power tool; and a server-side reception unit that receives the physical quantity data and the time information transmitted from the tool-side transmission unit and mapped to the identification information on the electric power tool; and a status evaluation unit that reads, from the storage apparatus, the past physical quantity data and the past time information stored and mapped to the identification information same as the identification information mapped to the physical quantity data and the time information which are received by the server-side reception unit, analyzes temporal transition of a status of the electric power tool by using the received physical quantity data and the time information, and the past physical quantity data and the past time information read from the storage apparatus, and evaluates a level of the status of the electric power tool. a motor; an output shaft on which a front-end tool is adapted to be mounted; a power transmission mechanism that transmits a rotational output of the motor to the output shaft; an acquisition unit that acquires physical quantity data detected while the motor is being rotated; a storage unit that stores the physical quantity data and time information related to time when the physical quantity data is acquired, mapping the physical quantity data and the time information to each other; and a tool-side transmission unit that transmits the physical quantity data and the time information to the server system, mapping the physical quantity data and the time information to identification information on the electric power tool, the server system including: a storage apparatus that stores past physical quantity data and past time information, mapping the past physical quantity data and the past time information to the identification information on the electric power tool; and a server-side reception unit that receives the physical quantity data and the time information transmitted from the tool-side transmission unit and mapped to the identification information on the electric power tool; and a status evaluation unit that reads, from the storage apparatus, the past physical quantity data and the past time information stored and mapped to the identification information same as the identification information mapped to the physical quantity data and the time information which are received by the server-side reception unit, analyzes temporal transition of a status of the electric power tool by using the received physical quantity data and the time information, and the past physical quantity data and the past time information read from the storage apparatus, and evaluates a level of the status of the electric power tool. a storage apparatus that stores past physical quantity data and past time information, mapping the past physical quantity data and the past time information to the identification information on the electric power tool; and a server-side reception unit that receives the physical quantity data and the time information transmitted from the tool-side transmission unit and mapped to the identification information on the electric power tool; and a status evaluation unit that reads, from the storage apparatus, the past physical quantity data and the past time information stored and mapped to the identification information same as the identification information mapped to the physical quantity data and the time information which are received by the server-side reception unit, analyzes temporal transition of a status of the electric power tool by using the received physical quantity data and the time information, and the past physical quantity data and the past time information read from the storage apparatus, and evaluates a level of the status of the electric power tool.