A sensor system (100A, 100B, 100C, 100D) equipped with a vehicular cleaner comprising: a sensor configured to operate in a normal mode and a standby mode; a cleaner unit configured to clean the sensor in response to an operation signal output in accordance with a dirt determination result of the sensor; and a control unit (220, 230, 320) configured to control the sensor and the cleaner unit, wherein the sensor is configured to operate in the normal mode, in which the sensor is operated at a predetermined cycle, and in the standby mode, in which the sensor is operated at a cycle longer than in the normal mode, the cleaner unit is configured to operate in a regular mode in which the cleaner unit operates in response to the operation signal and to operate in a block mode in which the cleaner unit does not operate even when the operation signal is input, characterized in that the control unit (220, 230, 320) includes: a fixed dirt determination unit (222, 232) configured to determine whether dirt on the sensor is removable by cleaning by the cleaner unit; a first mode-switching unit (224, 234) configured to switch the sensor from the normal mode to the standby mode when the fixed dirt determination unit determines that the dirt on the sensor is not removable; a sensor restoration determination unit configured to determine whether the dirt has been removed based on sensor output acquired in the standby mode when the sensor was operated in the standby mode; and a second mode-switching unit (225, 235C, 235D) configured to switch the sensor back from the standby mode to the normal mode when the sensor restoration determination unit determines that the dirt on the sensor has been removed, and the control unit is configured to operate the cleaner unit in the regular mode when the sensor is in the normal mode and to operate the cleaner unit in the block mode when the sensor is in the standby mode. a sensor configured to operate in a normal mode and a standby mode; a cleaner unit configured to clean the sensor in response to an operation signal output in accordance with a dirt determination result of the sensor; and a control unit (220, 230, 320) configured to control the sensor and the cleaner unit, wherein the sensor is configured to operate in the normal mode, in which the sensor is operated at a predetermined cycle, and in the standby mode, in which the sensor is operated at a cycle longer than in the normal mode, the cleaner unit is configured to operate in a regular mode in which the cleaner unit operates in response to the operation signal and to operate in a block mode in which the cleaner unit does not operate even when the operation signal is input, characterized in that the control unit (220, 230, 320) includes: a fixed dirt determination unit (222, 232) configured to determine whether dirt on the sensor is removable by cleaning by the cleaner unit; a first mode-switching unit (224, 234) configured to switch the sensor from the normal mode to the standby mode when the fixed dirt determination unit determines that the dirt on the sensor is not removable; a sensor restoration determination unit configured to determine whether the dirt has been removed based on sensor output acquired in the standby mode when the sensor was operated in the standby mode; and a second mode-switching unit (225, 235C, 235D) configured to switch the sensor back from the standby mode to the normal mode when the sensor restoration determination unit determines that the dirt on the sensor has been removed, and a fixed dirt determination unit (222, 232) configured to determine whether dirt on the sensor is removable by cleaning by the cleaner unit; a first mode-switching unit (224, 234) configured to switch the sensor from the normal mode to the standby mode when the fixed dirt determination unit determines that the dirt on the sensor is not removable; a sensor restoration determination unit configured to determine whether the dirt has been removed based on sensor output acquired in the standby mode when the sensor was operated in the standby mode; and a second mode-switching unit (225, 235C, 235D) configured to switch the sensor back from the standby mode to the normal mode when the sensor restoration determination unit determines that the dirt on the sensor has been removed, and the control unit is configured to operate the cleaner unit in the regular mode when the sensor is in the normal mode and to operate the cleaner unit in the block mode when the sensor is in the standby mode.