Dear,

IOT is the field of computer technology, where physical devices are communicating over the Internet. Devices are termed as things which are sensors, actuators that communicate and send information to each other on the web. It is an ecosystem where the interacting devices share data through a communication media known as the internet.
These devices are instructed with code to operate on a special event.

Artificial Intelligence is the field in computer technology that uses data as fuel and human actions to decide the output. Machines that are AI capable and are capable of cognitive thinking that is responsible to decide on the past or responding to an action to which the machine was unaware. These systems are built to support automation in the traditional approaches of building systems.
AI machines learn from past experiences and improve their performance for the future.

Hope this helps!