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In order to correct the excessive deflection behavior of magnetometer and make the navigation coordinate more fit the ideal preset coordinate value, an indoor and outdoor integrated navigation system based on MEMS sensor was designed. The electric signal output by the circuit of multi-source external module is integrated and fed back to MEMS magnetometer and navigation element of microprocessor respectively. Then, the transmission behavior of navigation information data in the module is defined according to the map space, and the remaining storage capacity of the fusion information unit is determined, and the hardware structure of the multi-source fusion navigation system is designed. On this basis, the real-time coordinate of MEMS sensor is defined, and the multi-source fusion relationship between navigation point and sensor information is processed by calculating the value of position and pose angle, and the coordinate transformation based on MEMS sensor is completed. According to the known principle of path node translation transformation, the rotation and scaling results of node coordinates are obtained, and the visual processing of navigation path is completed. Then, combined with the structure of related hardware equipment, the design of indoor and outdoor multi-source integrated navigation system based on MEMS sensor is realized. Experimental results show that compared with the navigation system based on dimensionality reduction dual quaternion, the maximum difference between the measured Angle and the ideal Angle can only reach 3.7° under the action of MEMS sensor, which can make the real navigation coordinate results more fit the ideal preset coordinate value, and meet the practical application requirements of accurate navigation.