According to an aspect of a present invention, there is provided a semiconductor device including a first power monitoring device and a second power monitoring device. The first power monitoring device outputs first operating power that is to be supplied to a second control section. The second power monitoring device outputs second operating power that is to be supplied to a first control section. Based on a first setting given from the first control section, a first power monitoring circuit autonomously verifies whether the second operating power is normal, and periodically transmits the result of verification to the second control section as first error information. Based on a second setting given from the second control section, a second power monitoring circuit autonomously verifies whether the first operating power is normal, and periodically transmits the result of verification to the first control section as second error information.