Human has worked for life for a long time since the agricultural society appeared. To free themself from busy physical works, human turned to using animals like cattles and horse, and then, invented some iron tools, which were sample machines or rabots. From then on, the machines became stronger, smarter and accurater, they started to take a more and more important role in the social work. Consequently, it’s easy to see that the rabots will take place human in physical activities mostly, as which is the main reason why they had been made.

However, they can not run independently. These machines or rabots have no thought----they must be controled by human at present. But how long can this situation continue? As the development of the software ---- artifical intelligence, maybe one day in the near future, we will see a rabot with independent thoughts. We will be replaced because when computers can think what to do and how to do, they will make the decision on their own and control the connected hardware in the real world to do what they think is right. As the time goes by, they become smarter and smarter , even smarter than human, and finaly we can not understand rabots anylonger.

Although most human will be replaced in my opinion, we can still find our own value. Everytime the technology revolution cut some jobs, there something new appeared. So don’t worry, though the rabots replace human to work, they can’t replace a real person. In other words, humanity has new value to be found and achieved.