An integrated circuit, and a control method and system, for use in improving the reliability of the integrated circuit. The integrated circuit mainly comprises a power source pin (P1), configuration pins (P4, P5), pull-up switch resistors (KR1, KR2), and a control unit (2011). The integrated circuit can provide control signals for a target chip (202) by means of the configuration pins (P4, P5). In the integrated circuit, first ends of the pull-up switch resistors (KR1, KR2) are connected to the power source pin (P1), second ends of the pull-up switch resistors (KR1, KR2) are connected to the configuration pins (P4, P5), and control ends of the pull-up switch resistors (KR1, KR2) are connected to the control unit (2011); the power source pin (P1) can receive a power supply voltage of the integrated circuit; the control unit (2011) can control the pull-up switch resistors (KR1, KR2) to be in a disconnected state before the target chip (202) is powered on. The present invention facilitates preventing the target chip (202) from receiving an error signal from the configuration pins (P4, P5) of the integrated circuit before power on, thereby facilitating improving the reliability of the integrated circuit. In addition, the present invention further facilitates simplifying the structure of a peripheral circuit of the integrated circuit.