This is a professional tool for analyzing time series data, supporting the calculation and visualization of autocovariance and autocorrelation functions (ACFs) of random processes. Users can input a time series of any length, and the system automatically generates an autocorrelation plot to help identify periodic and stationary characteristics in the data. It features a simple interface and intuitive operation, supports exporting PDF reports for archiving and sharing results, and provides a history record function for easy review and management of analysis processes. It is suitable for scientific research, teaching, and engineering data analysis scenarios.