What type of floor do you have? Cement? What's underneath the floor in question? Install a gutter ... Do you mean a roof gutter? Or do you mean some sort of gutter to 'catch' water along, say, the perimeter of the room? If the floor in question above or below grade?
Give me a little more info about the bigger picture, and more details.
PS: After this afternoon, I won't be back until Monday morning. 'Other Follow-uppers' will be around ...