I decided to use the Fourier series to solve the Riemann Hypothesis. This article approached the Riemann Hypothesis as a periodic function with a Fourier series.To solve the Riemann Hypothesis, I approached the main content of the Riemann Hypothesis, the function of the Riemann Hypothesis. Here, I did not write the calculation process in this article, so if you want to check the authenticity, do the calculation yourself.To understand this article, you must be familiar with the Fourier series. Because the important point in this proof is that the Fourier series is important. Here, the Fourier series is a Fourier series, a Fourier transform, and an inverse Fourier transform.In this proof I converted the Riemann zeta function into a periodic function and then approached the solution of the Riemann zeta function as a Fourier series. The way I approached it is simple. After converting the solution into a periodic function, the Fourier series was used to confirm its authenticity. Here, the proof was attempted with the real part of the solution period function of the Riemann zeta function fixed as a critical line. And in the main body of this article, we will show the detailed proof process.