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領館要父親現在在中國 要申請601， 需要再去領事館申請嘛
-No. 

我看了很多網上信息 說是要寄到美國境內的移民局？
-Correct. See:
https://www.uscis.gov/forms/centralized-filing-and-adjudication-form-i-601-application-waiver-grounds-inadmissibility

https://www.uscis.gov/i-601-addresses

還有這個需要律師嘛, 最後如果我是公民、成功的機會會大一些呢？？謝謝大家了！
-You had better hire a lawyer or at least consult a lawyer.