Wideband mid-infrared spectroscopy (MIR) technology is a cutting-edge non-invasive detection technology that aims to achieve higher speed and sensitivity as society evolves. High-speed Fourier transform infrared spectroscopy (FTIR), as the benchmark technology for chemical imaging, has been improving the measurement scan rate, but it is limited by the signal to noise ratio (SNR). To overcome these limitations, new detectors, improved signal preprocessing techniques, and techniques such as light source stability and quantum efficiency optimization are constantly being innovated. In addition, a time-stretched infrared spectroscopy technique combining nonlinear upconversion processes (UC-TSIR) breaks through the limitations of traditional methods. Compared with FTIR, UC-TSIR has a higher SNR, and the key breakthrough is to achieve a high scan rate and data acquisition rate. This leapfrog advance will meet a variety of unmet needs in experimental molecular science and can also be used in other sensing technologies, such as MIR optical coherence tomography (OCT) technology.