there are two ways as of now, old scoring system (service point??) and new scoring system (rally point), which is just introduced last year and now it's approved by the IBF. Using the old scoring system, you get a point only if your side serves and wins the rally. You have two serving chance (first/second serve) except when the game begins. The new scoring system, you get a point regardless your side serves or not. And there is no second serve. You only serve once. You can Google with "Laws of Badminton" and it will give you more details.
ach game is played to 21 points, with players scoring a point whenever they win a rally regardless of whether they served  (this differs from the old system where players could only win a point on their serve and each game was played to 15 points). A match is the best of three games.
The game begins with a coin toss. The winner(s) of the coin toss chooses to serve or receive. If they choose to serve, the other competitor(s) choose side. If they choose to receive, they choose side as well. The winner of the rally serves for the next rally. Regardless of who serves, the winner of the rally is given a point. First one to 21 wins. The game must be won by at least two points. If the game is tied or one point is the difference between the competitors at 21, the game continues until the competitor(s) are two points ahead or reach a maximum at 30. The first competitor(s) to win two games out of a possible of three win the match.
Each game is played to 21 points or 11 points.If both the opponents reach together at the game point a system of 'DUCE' is introduced. In this the player who takes 2 points continuously wins the set.
The current scoring system in badminton is the 3 x 21 rally point scoring system. This means that matches are played to 21 points, with a required 2 points difference between scores.
A type of scoring that was used by the acient greeks. The Classic scoring was invented by Jim Carrey in the year 1873.
scoring system of scrabble
A match in badminton is a game up to fifteen points. Matches make up sets and usually, in badminton, one set is made up of three matches. Each match has fifteen games.
The old scoring system which was vastly better than the current television driven system, comprised of the best of three sets to 15, with setting taking place to 17 if 14 all was reached. Scoring was only possible on the serve, and each side had two serves, be that mixed or doubles, and one serve for singles. this meant that a serve had to be earned before points could be registered, this made for longer games and a greater degree of aggression and indeed skill being used, so making it a better spectacle for all grades up to Pro. The current scoring to 21 is merely a battle of wits so as not to make a mistake, and by association killing the ingenuity of players to hone their skill. Simply now it is keep it in play! this is not what badminton is about. But then there you go. LONG LIVE OLD SCORING, and hopefully we will see a full British and Irish return to old scoring.!
The objective of a scoring system is that to know who is winning and who is loosing.
The Apgar Scoring System Chart was developed to rate a baby's appearance, pulse, responsiveness, muscle activity, and breathing.