Tilting electric-driven ducted fans, owing to their capability to integrate vertical takeoff and landing with high-speed cruise characteristics, have become core propulsion components for electric vertical takeoff and landing (eVTOL) aircrafts. However, their high coupling with aircraft dynamics causes traditional evaluation methods based on fixed control strategies to fail in reflecting true performance, thereby limiting performance evaluation and further optimization. To address this issue, this study proposes a performance evaluation method based on optimal aircraft/propulsor cooperative control. By dynamically matching flight trajectories with ducted fan control strategies, it optimizes the operational efficiency of the ducted fan during takeoff, tilting, and climb phases, thereby obtaining more reasonable operational characteristics of the ducted fan for analysis and further optimization. The study analyzes the operational characteristics of the fixed- structure tilting ducted fan and compares the performance enhancement effects of two adjustment schemes: adjustable blade installation angles and adjustable nozzle area. The results show that: under the optimal aircraft/propulsor cooperative control strategy, the ducted fan adiabatic efficiency can be maintained above 85.0% during the takeoff, tilting, and climb phases. When entering the cruise phase, the adiabatic efficiency decreases to 76.5% due to reduced rotational speed. By adjusting the blade installation angles, the ducted fan adiabatic efficiency can reach 85.0% with a 9.9% cruise range increase; whereas the nozzle adjustment scheme enhances the pressure ratio to mitigate the effects of total pressure loss, achieving a 19.5% cruise range improvement while maintaining identical ducted fan adiabatic efficiency (85.0%), demonstrating more significant enhancement effects.