Flame photometer has a high resolution for the detection of alkali and alkaline earth metal ions such as sodium, potassium, lithium, and calcium. Flame photometry separates the characteristic spectra of an element while also measuring emission by atomizing a solution sample into a flame. Alkali and alkaline earth metals, such as Na, K, Ca, and Mg, play important functions in the human body. They are crucial in physiology, industry, and pharmaceuticals as well. In a wide range of applications, routine, accurate, and reliable qualitative and quantitative assessment of these metals is critical. Since the beginning of time, flame photometry has been the most widely utilised technology for this purpose. This resurrected paper discusses the numerous applications of flame photometry that have been carried out to date.