园林设计，又称为“造园”，是在中国（或东亚其他国家）的传统园林理论的基础上，具有建筑、植物、美学、文学等相关专业知识的人士对自然环境进行有意识改造的思维过程和筹划策略。而发源于西方的，近现代传入中国的“景观建筑学（Landscape Architecture）”，则与中国传统意义上的园林设计学有着近似的专业领域。

具体的讲，园林设计是在一定的地域范围内，运用园林艺术和工程技术手段，通过改造地形、种植植物、营造建筑和布置园路等途径创造美的自然环境和生活、游憩境域的过程。通过园林设计，使环境具有美学欣赏价值、日常使用的功能，并能保证生态可持续性发展。在一定程度上，体现了当时人类文明的发展程度和价值取向及设计者个人的审美观念。

Garden design is the art and process of designing and creating plans for layout and planting of gardens and landscapes. Garden design may be done by the garden owner themselves, or by professionals of varying levels of experience and expertise. Most professional garden designers have some training in horticulture and the principles of design, and some are also landscape architects, a more formal level of training that usually requires an advanced degree and often a state license. Amateur gardeners may also attain a high level of experience from extensive hours working in their own gardens, through casual study, serious study in Master Gardener Programs, or by joining gardening clubs.