In this paper, we describe the current state of speech recognition technology and identify the basic
speech recognition technology and algorithms first, and then explain the code flow of API necessary for
speech recognition technology. We use the application programming interface (API) of Google, Naver, and
Daum KaKao, which have the most famous search engine among the speech recognition APIs, to create a
voice recognition app in the Android studio tool. Then, we perform a speech recognition experiment on people's standard words and dialects according to gender, age, and region, and then organize the recognition
rates into a table. Experiments were conducted on the Gyeongsang-do, Chungcheong-do, and Jeolla-do
provinces where the degree of tongues was severe. And Comparative experiments were also conducted on
standardized dialects. Based on the resultant sentences, the accuracy of the sentence is checked based on
spacing of words, final consonant, postposition, and words and the number of each error is represented by
a number. As a result, we aim to introduce the advantages of each API according to the speech
recognition rate, and to establish a basic framework for the most efficient use.