You will need a student visa to study in colleges and universities located in New Zealand. If you plan to enrol in a full-time course or intend to stay for more than three months in the country you will need a student visa. For a New Zealand student visa, you need to meet certain criteria. During the visa process you will have to furnish a letter of acceptance which is issued by the educational institution in New Zealand.
It is important that you meet character and health requirements which are laid down by New Zealand immigration. You must provide evidence of funds which prove that you have adequate finances to support yourself in the foreign country and pay fees. You must provide a valid passport and prove to the officials that you will leave the country on completion of studies. During your stay in New Zealand, you must abide by the laws.