If you correct my sentence, I'll give you 1000 dollars Hellow my name is Hirotaro Kubo and today I'd like to talk about Alexander Graham Background Bell and his work to create phone. In 1876, Bell invented a phone. Actually, phone was not made for the purpose of telling voice message to far place. Phone was made in the middle of improving the telegraph technology. At that time，scientists couldn't convert the weak voice energy to electronic signal by previous telegraph technology. Also, they couldn't send strength of voice though they could send tone of voice. Research Question Can we transmit the voice energy by improved telegraph to practical useful and strong electronic information? Methods and Data In 1876, Bell invented a phone. 1 Elisha Gray discovered the fact that sounds occurred when tracing electromagnet by hand. He is cooperator with Bell. 2 Bell successed to convert the voice wave received from vibration plate to vibration by electromagnet and generate voice from vibration plate. 3 Bell said to assistant Watson "Mr. Watson ! Come here, I want to see you." And Watson heard it in the room next door. Conclusions and Future Research Bell's work was a tremendous success. Now telecommunication business is exciting thanks to this invention. Bell's work enable us to communicate people living far place.