Good answer for my question
I found the answer and put it here for others information
http://www.ssa.gov/ssnvisa/Handout_11_1.html
Social Security Numbers for U.S. Permanent Residents
We are pleased you intend to immigrate to the United States. Upon admission to the United States based on your immigrant visa, you will be a U.S. permanent resident. Each permanent resident needs a Social Security Number (SSN). An SSN will help you to work in the United States, to conduct business with a bank or financial institution, to pay your taxes or to be listed as a dependent on a tax return, and for other purposes.
If You Requested an SSN When You Applied for Your Visa
If you requested an SSN card as part of your visa application, U.S. Department of State (DoS), Form DS 230, Part II, Questions 33a and 33b, and you are age 18 or older when you arrive in the United States, the U.S. DoS and the U.S. Department of Homeland Security will share with us the information needed to issue you an SSN card. Therefore, you do not need to fill out a special application or go to a Social Security office to get an SSN.
We will assign you an SSN and issue you a Social Security card after you arrive in the United States. If you already have an SSN, we will issue you a replacement SSN card. We will mail your SSN card to the U.S. mailing address where the Department of Homeland Security will send your Permanent Resident Card. You should receive your Social Security card within 3 weeks after you arrive.
IMPORTANT: Call us if you do not receive your Social Security card after 3 weeks or if you change your mailing address after arrival in the United States. If you call us, please have this letter with you. It will help us answer your questions.
If You Did Not Request an SSN When You Applied for Your Visa or You are Under Age 18
You must come to a Social Security office to apply for an SSN if you did not request an SSN card as part of your visa application or you are under age 18 when you arrive in the United States. When you have a permanent address, please call us to find out where to apply for an SSN card.