The submerged turret production (STP) single-point mooring system operates in an environment subjected to the combined effects of mooring forces， wind， waves， and currents. Through contact with structures such as the buoyancy and mating cone module (MCM)， it transfers the impact of these loads to the hull. Under the prolonged influence of alternating loads， the MCM is prone to fatigue issues at positions where structural stress is concentrated， potentially leading to crack initiation; under extreme wind and wave conditions， there may even be a failure of structural ultimate strength， rendering the floating production storage offloading (FPSO) unable to operate normally. Therefore， developing a design for a multi-parameter monitoring and early warning system that is safe， reliable， and stable for the STP single-point system is crucial for ensuring the normal， steady， and secure operation of the FPSO. This paper focuses on the MCM of a certain FPSO， conducting structural finite element analysis to calculate the stress distribution state of the MCM structure under working conditions， identifying high-stress locations in critical areas， and providing recommendations for sensor placement schemes. This lays the groundwork for developing a monitoring and early warning system for the STP single point and arranging stress sensors.