Imaging dynamically changing events requires time-resolved measurements, which can be challenging for multidimensional imaging applications, especially when the time scale approaches the limit of electronics. In this chapter, we described typical sampling-based temporal domain imaging techniques, often in the nanosecond to femtosecond regimes. The general pulse sampling principles are first introduced along with the concept of time-space conversion and its application in fast optical signal measurements. Key instrumentation technologies enabling such measurements (e.g., light sources and detectors) are summarized. The basic sampling-based time-domain imaging techniques and their variations are subsequently presented, which is the focus of the chapter.