As a widely adopted surface strengthening technique for metals, shot blasting treatment can effectively enhances material fatigue resistance and extends service life by inducing compressive residual stresses through high-velocity shot impacts. To achieve precise measurement and control of the steel shot flow in shot blasting machine, a ferrous shot flow measurement and control device with integrated detection and control capabilities has been developed. The principle of ferrous shot flow detection was analyzed based on electromagnetic field theory, and an equivalent model describing the influence of ferrous shot flow on the magnetic field distribution characteristics of the solenoid sensor was established. This principle was validated through finite element simulation. The LDC1612 inductance-to-digital conversion circuit was adopted in the detection, data acquisition of ferrous shot flow rate was achieved based on the LC parallel resonance and the measurement noise was eliminated via a periodic average value filtering algorithm. The controller generates control signals based on the collected flow data through PID operation, while the control unit dynamically adjusts the duty cycle of the generated PWM signal to regulate the opening and closing time of the solenoid valve, thereby the closed-loop control of the shot flow was achieved. Experimental results demonstrated a linear relationship between the S330 and S110 shot flows and the difference in LC resonant frequency, as well as a two-segment linear relationship between the shot flow and the duty cycle of the PWM signal, with a fitting accuracy exceeding 99.2%. The detection accuracy for the S330 shot flow reaches ±2.5%, and for the S110 shot flow, it reaches ±4.33%, the excellent metrological performance of this integrated measurement and control system was confirmed.