Insects made their first debut on earth 480 million years ago and have interacted with humans through a love-hate relationship. They are very fertile with enormous influence on nature. It might seem disgusting to you, but insects are a food source in many places across the globe. Depending on the association, be it parasitism, commensalism, or mutualism at the time, people decide to take action to combat or encourage insects worldwide. Although insects have various negative impacts on humans, their positive contributions far outweigh any harm they cause. They, therefore, are a necessary part of life. This course will give a general introduction and hope to clarify common misunderstandings of these six-legged creatures through in-class lectures and off-campus activities. Field trips on the NTU campus, to the NTU Insectarium, the Taiwan insect museum, and Fuyang Ecological Park will be arranged for students to observe insects commonly found in open environments and learn how to recognize them using field guide/naked eyes. Lecture topics include but are not limited to insect morphology, systematics, diversity, ecology, and behavior. Guest lectures from NTU/NCHU/NCU faculty and industry will be eye-openers.