Road?weather forecast method?and system, and road?weather forecast display method?and system

The invention discloses a road?weather forecast method?and a system, and a road?weather forecast display method?and a system. The road?weather forecast method comprises steps of dividing a forecast region into a plurality of grid-shaped?regions according to specified precision, acquiring conventional weather forecast in each grid-shaped?region, acquiring relative land parameters with the land type included in each grid-shaped?region, and acquiring at least one of pavement?precipitation?phase, pavement temperature, pavement condition and travel?visibility according to the conversion relationship, the conventional weather forecast and the relative land parameters with the land type included stored in advance. According to the method and the system provided by the invention, in comparison with the existing road traffic weather forecast, road weather forecast which is more professional and more in line with the actual situation can be provided, and travel safety is improved.