A measurement system comprising: a measurement apparatus comprising: a measuring probe; a power supply unit provided to the measuring probe; a first communication unit supplied power from the power supply unit and configured to perform communication of a type-1 signal via first communication means, the type-1 signal containing information regarding measurement performed in the measuring probe; and a second communication unit supplied power from the power supply unit and configured to perform communication of a type-2 signal via second communication means, the type-2 signal containing information regarding power supply performed in the power supply unit, the second communication means being more reliable than the first communication means, the power supply unit comprising a first power storage unit, and the type-2 signal containing an amount of power stored in the first power storage unit as the information regarding power supply performed in the power supply unit; the measurement system further comprising: a control apparatus configured to perform communication of a signal with the first communication unit and the second communication unit; wherein when the control apparatus determines based on the type-2 signal that power supply capacity of the power supply unit is insufficient, the control apparatus controls the power supply unit to supply power solely to the second communication unit among the first communication unit and the second communication unit. a measurement apparatus comprising: a measuring probe; a power supply unit provided to the measuring probe; a first communication unit supplied power from the power supply unit and configured to perform communication of a type-1 signal via first communication means, the type-1 signal containing information regarding measurement performed in the measuring probe; and a second communication unit supplied power from the power supply unit and configured to perform communication of a type-2 signal via second communication means, the type-2 signal containing information regarding power supply performed in the power supply unit, the second communication means being more reliable than the first communication means, the power supply unit comprising a first power storage unit, and the type-2 signal containing an amount of power stored in the first power storage unit as the information regarding power supply performed in the power supply unit; a measuring probe; a power supply unit provided to the measuring probe; a first communication unit supplied power from the power supply unit and configured to perform communication of a type-1 signal via first communication means, the type-1 signal containing information regarding measurement performed in the measuring probe; and a second communication unit supplied power from the power supply unit and configured to perform communication of a type-2 signal via second communication means, the type-2 signal containing information regarding power supply performed in the power supply unit, the second communication means being more reliable than the first communication means, the power supply unit comprising a first power storage unit, and the type-2 signal containing an amount of power stored in the first power storage unit as the information regarding power supply performed in the power supply unit; the measurement system further comprising: a control apparatus configured to perform communication of a signal with the first communication unit and the second communication unit; wherein when the control apparatus determines based on the type-2 signal that power supply capacity of the power supply unit is insufficient, the control apparatus controls the power supply unit to supply power solely to the second communication unit among the first communication unit and the second communication unit. a control apparatus configured to perform communication of a signal with the first communication unit and the second communication unit; wherein when the control apparatus determines based on the type-2 signal that power supply capacity of the power supply unit is insufficient, the control apparatus controls the power supply unit to supply power solely to the second communication unit among the first communication unit and the second communication unit.