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Traditional classroom teaching equipment has a simple to read and write function, network interactive ability is poorer, because the larger data in the file transfer flow cause apparent network latency, in this paper, a class terminal PDA system based on ZigBee network, designed the master-slave CPU work by turns, optimize share the data flow in the classroom interaction, based on ZigBee technology to realize the terminal equipment of the wireless connection, in the peripheral circuit design the dedicated SD memory card, is advantageous for the data migration, wireless transmission module in the original link upgrades in the ZigBee network protocol, uses hierarchical routing mechanism, reduce the packet routing delays. PDA network in different area of the classroom teaching experiments downward to send data can be completed in 10 milliseconds and bit error rate is 0.001%, ascending to send data 99.7% success rate. It proved that the system has a stable network performance and practicality.