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领馆要父亲现在在中国 要申请601， 需要再去领事馆申请嘛
-No. 

我看了很多网上信息 说是要寄到美国境内的移民局？
-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

还有这个需要律师嘛, 最后如果我是公民、成功的机会会大一些呢？？谢谢大家了！
-You had better hire a lawyer or at least consult a lawyer.