yes, you can control and update led matrix data via the internet, if you find this kind of projects so you came in the right place. follow the step and connection diagram to connect your esp8266 and led matrix as shown in the given circuit diagram....
64*64 LED MATRIX INTERFACING USING ESP8266
if your led matrix panel is away from your height and impossible place like road advertising led matrix it's not possible to go and upload the data to the board I have to suggest full tutorial how to update data via the internet with no data lose and with using secure user name and password to encrypt the data .
how to make this projetcs .
connecting the jumper wire to the led matrix panel with the same pin given in the connection diagram. after connecting download and install the led matrix library and then upload the code into esp8266 , then connect GND to GND and VCC to 5v of Arduino pin.
ESP8266 WITH LED MATRIX CONNECTION DIAGRAM.