The artificial intelligence (AI) is used to automate the operation by taking a decision based on the situation or conditions. It is expected that around 2025, Robotics can move on earth similar to a human and support human society. Artificial Intelligence (AI) is in every field to automate the decision making intelligence to execute the desired operation. Understanding the need and importance of AUV for underwater operation, the authors have identified the need an AUV for the monitor, search and rescue operation. During the development unmanned vehicle, it was identified that the major task and key functionalities to be known to the researchers who want to contribute in this AI domain. The functionalities of AUV is decided by features which can be grouped into six categories as (i) Design of AUV shape (ii) Functionalities (iii) Design of Mechanical and Electrical system (iv) Control system (v) Navigation system (vi) Embedded system/software programming and (vii) Propulsion system. As a researcher, understanding each task or goal is very much needed and useful. Keeping the new researchers need, each task has been studied and highlighted the critical issue in each task which was faced in our development process. This paper can encourage many new researchers to do research in the upcoming domain of AUV.