我是香港人, 我已過了40歲還可以到紐西蘭 讀書工作嗎 ?

讀書沒問題 工作的話 我認為有難度 除非你有過人之處

In theory, yes.

In practice, difficult. Unless you plan to study anything significant and substantial, New Zealand is unlikely to issue a student visa as the studying may be a sign for illegal immigration.