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To solve family connected to the water, electricity, gas three table data wide-area transmission problem of low power consumption, low cost, design the intelligent gateway based on NB - IoT networks, STM32F103 chip as the core controller, mainly including three table data acquisition interface, NB - IoT network interface and home intelligent terminal extension interface, realized the family three tables of intelligent data acquisition and transmission function of the cloud platform, and provide network support for intelligent household service data. The designed intelligent gateway targeted can solve the problem of the unity of the three table data management, the innovative designs three table access gateway type 86 bottom box, on the basis of small change building electrical layout implementation the installation of the intelligent gateway. The experimental and application test results show that the designed intelligent gateway has the advantages of stable performance, low power consumption and easy installation.