In 1999, KMB became the first public bus company in Hong Kong to achieve ISO 9001:1994 certification on a company-wide basis, as accredited by the Hong Kong Quality Assurance Agency (“HKQAA”). In 2002, the excellence of KMB’s management systems was further confirmed as the company successfully upgraded to ISO 9001:2000 certification. In 2003, when Lai Chi Kok and Sha Tin Depots were awarded ISO 14001:1996 Environmental Management System certification, KMB became the only franchised bus company in Hong Kong with both ISO 9001 and ISO 14001 accreditation. Lai Chi Kok and Sha Tin Depots were subsequently upgraded to ISO 14001:2004 Environmental Management System certification in 2004 and 2005 respectively. In 2007, all the main operating depots of KMB at Lai Chi Kok, Sha Tin, Kowloon Bay and Tuen Mun were certified by the Q-Mark Council of the Federation of Hong Kong Industries as having met the Green Mark Standard under the Hong Kong Green Mark Certification Scheme. KMB successfully obtained from the HKQAA the newest ISO 9001:2008 certificates on completion of upgrading audits in the four certification areas: KMB Headquarters; Traffic Department and the four main operating depots; the Overhaul Centre; and the Unit Overhaul Depot.

KMB has received widespread recognition for its commitment to quality management through the receipt of many prestigiousawardsfrom professional organisations.

When KMB was founded, its bus fleet consisted of 106 small, single-deck buses. Today KMB is the largest bus operator in Hong Kong with 3,835 buses, of which 97.9% are air-conditioned. With more than 12,000 staff, KMB operates a network of 394 bus routes transporting about 2.55 million passengers every day. Having played an active part in the development of Hong Kong over the years, KMB has become one of the world's largest public bus companies and has gained recognition as an international leader in public bus transportation.

KMB has been a partner in Hong Kong's growth and expansion. As the population has grown and more new towns have been developed, the company's bus routes have increased in number. KMB's franchised bus network now extends from the Lok Ma Chau boundary across the New Territories and the Kowloon Peninsular to Hong Kong Island. With interchanges at the Tai Lam Tunnel and the Shing Mun Tunnels, and the Octopus Bus-Bus Interchange packages, KMB carries passengers to places all over Hong Kong. No other public transport system in Hong Kong runs a network on a similar scale. The Group also established Long Win Bus Company Limited to provide bus services to Hong Kong International Airport and neighboring Tung Chung.

Besides KMB's four main depots, each equipped with the most advanced facilities to handle daily operations and servicing, there are 11 other depots that provide parking and minor maintenance services. The KMB Overhaul Centre at Tuen Mun is listed in the Guinness Book of Records as the largest of its type in the world. The Lai Chi Kok Bus Depot was built in line with environment-friendly concepts and incorporates many modem facilities that enhance operational efficiency and effectiveness. Since 1973, KMB has run its own apprentice training school to foster the professional development of its maintenance and repair staff. The numerous awards won by KMB apprentices in the last few years in the Vocational Training Council's Best Apprentice Competition testify to their excellent performance.

KMB uses an internal assessment mechanism to review annually the two core competencies of bus operations, mechanical reliability and operational capability. KMB's statistics show that in 2010, the fleet achieved 48,023:1 on mechanical reliability against a target of 45,000:1. For the same period, the operational capability achieved by KMB was 97.2%.

As a result of the improvements achieved by its bus fleet, operations facilities and front-line staff, KMB's accident rate is continuously decreasing.

To promote KMB's quality service culture, KMB runs an annual Outstanding Service Award programme to reward staff for outstanding performance. In addition, Annual Good Service and Safe Driving Awards and Annual Good Service and Attendance Awards are presented to bus captains and terminus supervisors/assistant terminus supervisors respectively in appreciation of their dedication and contribution.

KMB provides training programmes for all grades of staff to maintain and upgrade the quality of its human resources. The KMB Bus Captain Training School provides comprehensive training and improvement courses for new and existing bus captains to ensure that they are well qualified to provide passengers with a safe, comfortable and reliable service. In early 2008, KMB introduced the state-of-the-art Driving Simulator Studio – Hong Kong's first – which simulates real-world driving environments to train bus captains and improve their decision-making and performance across a wide range of vehicle manoeuvres.

The KMB Technical Training School provides a four-year apprentice training course to ensure an adequate supply of skilled maintenance workers. The school also offers maintenance staff training in the latest bus transport technology.