有案底能移民澳洲嗎?

In general, all criminal records will be reviewed case by case.

However, based on the fact you have been imprisoned for 4 months, no need to try.

移民局會要求你出是相關的犯罪紀錄。

不太清楚澳洲的移民政策，但一般而言，絕大部份國家都不會接受有刑事記錄的人做移民的。