Hitherto, dynamic hemodynamic indicators based on "heart‑lung interactions" are the gold standard for guiding fluid resuscitation, but such indicators often were obtained by invasive monitoring and complexity process. In recent years, with the emergence of non‑invasive methods such as continuous non‑invasive arterial pressure (CNAP), hemodynamic monitoring system and ultrasound monitoring system were used in clinic, new prospects for the application of heart‑lung interactions indicators for volume therapy were opened up. This review describes the dynamic hemodynamics indicators based on "heart‑lung interactions" measured by CNAP system and ultrasound monitoring for estimating the volume responsiveness. Application of both methods has certain debate. Non‑invasive monitoring for assessing volume responsiveness is the trend of clinical fluid therapy. However, it is not currently recommended to use a non‑invasive method to guide fluid therapy because its application conditions are limited. But it can be used as a supplement of invasive monitoring to help doctors perform proper fluid management and reduce adverse events.