在当前计算机产业中,有效的数据存储通常还是由磁盘来实现的。现在,磁盘传输速度不断改善,但远没有微处理的速度增加快,因此,磁盘存取的代价相对于处理器来说,变得越来越大。本文设计并实现一个网络RamDisk,其主要思想是利用远地空闲PC机的内存,来作为一个比本地磁盘快的存储设备。我们的网络RamDisk是在Linux操作系统下,作为一个块设备驱动程序来实现的,因此,不需要修改任何Linux系统的内核代码。我们使用了一些应用程序进行测试,获得了较好的性能. In the current computer industry, efficient data storage is usually done by disk. Disk transfer rates are now improving, but far less microprocessors are increasing faster, so disk access costs more and more for processors. This paper designs and implements a network RamDisk, the main idea is to use the memory of the remote free PC as a storage device faster than the local disk. Our network RamDisk is implemented as a block device driver under the Linux operating system, so there is no need to change the kernel code of any Linux system. We used some applications for testing and got better performance.