To provide a motor control device capable of discharging the charges accumulated in a capacitor without installing a discharging resistor or an additional circuit for discharging, and to provide a vehicle system.

The motor control device has a structure in which a plurality of arms formed by connecting upper transistors and lower transistors in series are connected in parallel between a power supply V1 and a ground V2, and is connected to inverters 20 in which intermediate points of the plurality of arms are connected to terminals of each phase of the motor coil. The motor control device controls switching of the upper transistors and the lower transistors to drive the motor 40. The motor control device has a discharging function for causing the motor coil to consume the charges accumulated in a capacitor 21 disposed between the power supply V1 and the ground V2 by alternately turning on and off the upper transistors and the lower transistors which are activated while being disconnected from the battery 10 and disposed in all the arms.