Precise point positioning (PPP) has been well established for retrieving the precipitable water vapor (PWV) in the static model.Yet it is not always suitable for static PPP PWV retrieving,for an instance,the GNSS antenna keeps moving.Position and zenith total delay (ZTD) are coinstantaneously estimated in dynamic PPP model,which is an option for the PWV retrieving in dynamic scenario.GNSS data over 3.5 hours have been gathered from the Continuously Operating Reference Stations (CORS).Both static and dynamic PPPs have been applied for the CORS data processing.The result reveals that the maximum difference is 6.6 mm,and dynamic PPP PWV graduate movement agrees in magnitude with that from static PPP PWV.A rotation arm has been designed for GNSS receiver gathering data in dynamic scenario.PPP in dynamic model can retrieve the rotation arm PWV,which makes sense to the one from CORS PWV,but lose the capacity of detecting the PWV changes.GNSS station can have displacement in a short term in the earthquake event.Both static PPP and dynamic PPP have been assessed for this scenario.The result reveals that displacement due to the earthquake does not make an evident effect on the PWV retrieving both in static PPP and dynamic PPP.The static PPP is still recommended for the PWV retrieving over the earthquake period.