当我们拖着疲倦的身躯走下飞机,能否在路上用手机通过远程遥控来打开家里的电热水器或空调呢?一位家电公司的维修员在奔赴几十公里外的客户家里维修一台空调之前,能否先准确地弄清楚空调故障的部位和需要更换的零件,从而能够有备而去,避免来回的奔波呢?……类似的梦想十分诱人,但要想利用PC及现有的Internet技术实现这类 When we dragged the body tired and tired, can use the phone on the road through the remote control to open the home electric water heater or air conditioning it? A home appliance company’s maintenance staff went to the customer’s home tens of kilometers away to repair an air conditioner Before, can we first figure out the exact location of air conditioning failure and the need to replace the parts, which can be prepared to avoid back and forth to run around it ... ... a similar dream is very attractive, but want to use the PC and the existing Internet technology to achieve this