In order to solve the problem of automatic detection for pipeline stress, a pipeline stress detection equipment based on magnetic memory method (MMM) is developed. Firstly, the principle of MMM to detect the stress concentration was introduced. And then an embedded system based on S3C2440 MCU was designed. The weak magnetic field probe is anisotropic magneto resistance (AMR) sensor HMC 5883L. The visualization terminal based Linux system was developed. According to GB/T 35090, the criterion of stress concentration is carried out for the quantitative evaluation of pipeline. There is no significantly difference from that of TSC series detector from the validation experiment. Finally, the residual stress XRD method was used to verify the stress concentration of the samples. The experiment shows that the equipment can reflect the stress concentration in the material and is suitable for the detection of the stress concentration in the conveying pipeline.